ay be divided into,

I. Day Signals. II. Night Signals; and, III. Signals in a Fog.

They must also be distinguished into, 1. Signals of Evolution, addressed to the whole Fleet, or to Squadrons of the fleet, or to Divisions of these squadrons. 2. Signals of Movements to be made by particular ships; and, 3. Signals of Service, which may be either general or particular.

The great extent of a large fleet, the smoke in time during battle, and the situation of the commander in chief, engaged who is commonly in the midst of the greatest confusion of hottest fire, frequently makes it very difficult for the Admirals' officers of distant ships to perceive his signals with all their redistinctness. Frigates, therefore, are stationed out of beaten line, to windward or to leeward, whose sole office it is to observe the admiral's signals, and instantly to repeat the same. The eyes of all the signal officers in the private ships of war are directed to the repeating frigates, as well as to the admiral; and the officers of the repeating frigate, having no other duty, observe the admiral incessantly, and, being unembarrassed by the action, can display the signal with deliberation, so that it may be very distinctly seen. Being minutely acquainted with the substitutions which must be made on board the admirals' ships when masts and rigging are in disorder, his (perhaps imperfect) signal is exhibited by the repeating frigate in its proper form, so as to be easily understood. And to facilitate this communication, the commanders of the different squadrons repeat the signals of the commander in chief, and the commanders of division repeat the signals of the commanders of their squadron.

Every evolution signal is preceded by a signal of ad-vertised preparation, which is general, and signals are frequently by a gun, to call attention; and when all the preceding signals have been made which direct the different parts of the evolution, another signal is made, which marks the commencement of that evolution, another signal is made, which divides it from others and accommodates which may immediately follow it: and as the orders of the admiral with the commander in chief may relate either to the movements of the whole fleet, those of a single division, or those of certain private ships, the Executive Signal, which dictates the particular movement, is accompanied by a Directive Signal, by which these ships are pointed out, to which the order is addressed.

Answered. The commander of the ship to which any signal is addressed, is generally required to signify by a signal (which is general) that he has observed it. And if he does not thoroughly understand its meaning, he intimates this by another general signal. And here it is to be observed, that as soon as the signal is answered by the ships to which it is addressed, it is usual to haul it down, to avoid the confusion which might arise from others being hoisted in the same place. The order remains till executed, notwithstanding that the signal is hauled down.

It may happen that the commander who throws out the signal for any piece of service, sees reasons for altering his plan. He intimates this by a general Annulling signal, accompanying the signal already given. This will frequently be more simple than to make the signals for the movements which would be required for re-establishing the ships in their former situation.

All these things are of very easy comprehension, and require little thought for their contrivance. But when we come to the particular evolutions and movements, and to combine these with the circumstances of situation in which the fleet may be at the time, it is evident, that much reflection is necessary for framing a body of signals which may be easily exhibited, distinctly perceived, and well understood, with little risk of being mistaken one for another. We shall take notice of the circumstances which chiefly contribute to give them these qualities as we proceed in describing their different classes.

I. Of Day Signals.

These are made by means of the ship's sails, or by colours of various kinds.

Those made with sails are but few in number, and are almost necessarily limited to the situation of a fleet at anchor. Thus,

| The following Signals | Usually signify | |----------------------|----------------| | Main top-gallant stay-sail hoisted | Officers and men belonging to the ship to come on board. | | Fore top-tail loofe | To prepare for faling. | | Main top-tail loofe | To unmoor. | | Main top-tail sheets hauled home | To weigh. | | Main top-tail sheets clewed up, and the yard hoisted | Annull the former signal, and the ship to come to an anchor. | | Top-gallant sails loofe, and the sheets flying | Discovering strange sails. | | Main top-gallant sail loofe and hoisted. Topsail-yard down | Recal ships in chase. | | Mizen top-tail hoisted, and the sheets clewed up | Moor. |

Before we proceed to the description of the signals by means of colours, such as flags, banners (or triangular flags), pendants or vanes, we must take notice of the ostensible distinctions of the various divisions and subdivisions of a fleet, so that we may understand how the same signal may be addressed to a squadron, division, or single ship or ships. We suppose it known that a fleet of ships of war is distributed into three grand divisions (which we shall term squadrons), called the van, centre, and rear. These denominations have not always a relation to the one being more advanced than the other, either towards the enemy, or in the direction of their course.

In a land army, the position of every part is conceived from its reference to the enemy; and the reader, of the terms conceiving himself as facing the enemy, easily understands the terms van, centre, and rear, the right and left, and rear, in winging, &c. But the movements of a sea army having battle at a necessary dependence on the wind, they cannot be comprehended unless expressed in a language which keeps this circumstance continually in view. The simplest and most easily conceived disposition of a fleet, is that in which it is almost indispensably obliged to form in order to engage an enemy. This is a straight line, each ship directly ahead of its neighbour, and close hauled. This is therefore called the line of battle. In this position, the two extremities of the fleet correspond to the right and left wings of an army. Suppose this line to be in the direction east and west, the wind blowing from the north-north-west, and therefore the fleet on the starboard tack; the ships heads are to the west, and the westernmost division is undoubtedly the van of the fleet, and the easternmost division is the rear. And it is in conformity to this arrangement and situation that the list of the fleet is drawn up. But the ships may be on the same east and west line, close hauled, with their heads to the west, but the wind blowing from the south-south-west. They must therefore be on the larboard tack. The same ships, and the same division, are still, in fact, the van of the fleet. But suppose the ships heads to be to the eastward, and that they are close hauled, having the wind from the south-south-east or the north-north-east, the ships which were the real van on both tacks in the former situation are now, in fact, the rear on both tacks; yet they retain the denomination of the van squadron of this fleet, and are under the immediate direction of the officer of the second rank, while the other extremity is under the direction of the third officer. This subordination therefore is rather an arrangement of rank and precedence than of evolution. It is, however, considered as the natural order to which the general signals must be accommodated. For this reason, the division which is denominated van in the list of this fleet, is generally made to lead the fleet when in the line of battle on the larboard tack, and to form the weathermost column in the order of sailing in columns; and, in general, it occupies that station from which it can most easily pass into the place of the leading division on the larboard line of battle ahead. Although this is a technical nicety of language, and may frequently puzzle a landman in reading an account of naval operations, the reflecting and intelligent reader will see the propriety of retaining this mode of conceiving the subordinate arrangement of a fleet, and will comprehend the employment of the signals which are necessary for re-establishing this arrangement, or directing the movements while another arrangement is retained.

This being understood, it is easy to contrive various methods methods of distinguishing every ship by the place which she occupies in the fleet, both with respect to the whole line, with respect to the particular squadron, the particular division of that squadron, and the particular place in that division. This may be done by a combination of the position and colour of the pendants and vanes of each ship. Thus the colour of the pendants may indicate the squadron, their position or mast on which they are hoisted may mark the division of that squadron, and a distinguishing vane may mark the place of the private ship in her own division. The advantages attending this method are many. In a large fleet it would hardly be possible for the commander in chief to find a sufficient variety of single signals to mark the ship to which an order is addressed, by hoisting it along with the signal appropriated to the intended movement. But by this contrivance one third part of these signals of address is sufficient. It also enables the commander in chief to order a general change of position by a single signal, which otherwise would require several. Thus, suppose that the fore, main, and mizen masts, are appropriated (with the proper modifications) for exhibiting the signals addressed to the van, the centre, and the rear squadrons of the fleet, and that a red, a white, and a blue flag, are chosen for the distinguishing flags of the officers commanding these squadrons; then, if the commander in chief shall hoist a red flag at his mizen top-gallant mast head, it must direct the van squadron to take the position then occupied by the rear squadron, the evolution necessary for accomplishing this end being supposed known by the commander of the squadron, who will immediately make the necessary signals to the squadron under his particular direction. In the same manner, the distinguishing signal for the leading ship of a squadron being hoisted along with the signal of address to the whole fleet, and the signal for any particular service, will cause the three or the nine leading ships to execute that order, &c. &c.

All that has been said hitherto may be considered as so many preparations for the real issuing of orders by the commander in chief. The most difficult part of the language remains, viz. to invent a number of signals which shall correspond to that almost infinite variety of movements and services which must be performed.

Distinctness, simplicity, and propriety, are the three essential qualities of all signals. A signal must be some object easily seen, strongly marked, so that it may be readily understood, with little risk of its being mistaken for another. When made by flags, banners, or pendants, they must be of the fullest colours, and strongest contrasts. The ships are frequently at a very great distance, so that the intervening air occasions a great degradation of colour. They are seen between the eye and a very variable sky; and in this situation, especially in the morning or evening, or a dark day, it is not easy to distinguish one full colour from another, all of them approaching to the appearance of a black. At the distance of a very few miles hardly any full colours can be distinguished but a scarlet and a blue. Red, blue, yellow, and white, are the colours which can be distinguished at greater distances than any others, and are therefore the only colours admitted as signals. Even these are sometimes distinguished with difficulty. A yellow is often confounded with a dirty white, and a blue with a red. All other dark colours are found totally unfit. But as these afford but a small variety, we must combine them in one flag, by making it striped, spotted, or chequered, taking care that the opposition of colour may be as great as possible, and that the pieces of which the flags are made up may not be too minute. Red must never be striped nor spotted with blue, and the stripes, spots, or chequers, should never be less than one-third of the breadth of the flag. Plate CCCCXLVI. is a selection by an officer of experience as a set very easily recognised, and little liable to be confounded. Their colours are represented by hatching, in the same manner as in heraldry (See Heraldry).

Difference of shape, as flags, banners, or pendants, is another distinction by which the expression may be varied. And in doing this, we must recollect, that in light winds it may be difficult to distinguish a flag from a banner, as neither are fully displayed for want of wind to detach the fly from the flag.

And, lastly, signals may be varied by their position, simplicity, which may be on any lofty and well detached part of the masts, yards, or rigging.

Simplicity is an eminent property in all signals. They are addressed to persons not much accustomed to combinations, and who are probably much occupied by other pressing duties. It were to be wished that every piece of service could be indicated by a single flag. This is peculiarly desirable with respect to the signals used in time of battle. The rapid succession of events on this occasion call for a multitude of orders from the commander in chief, and his ship is frequently clad over with flags and pendants, so that it is exceedingly difficult for the signal officer of a private ship to distinguish the different groups, each of which make a particular signal.

These considerations are the foundation of a certain propriety in signals, which directs us to a choice among marks which appear altogether arbitrary. Signals which run any risk of being confounded, on account of some resemblance, or because their position hinders us from immediately perceiving their difference, should be appropriated to pieces of service which are hardly possible to be executed, or can hardly be wanted, in the same situation. No bad consequence could easily result though the signal for coming to closer action should resemble that for unmooring, because the present situation of the ships makes the last operation impossible or absurd. Such considerations direct us to select for battle signals, those which are of easiest exhibition, are the most simple, and have the least dependence on the circumstance of position; so that their signification may not be affected by the damages sustained in the masts or rigging of the flag ship. Such signals as are less easily seen at a distance, should be appropriated to orders which can occur only in the middle of the fleet, &c. &c. Signals which are made to the admiral by private ships may be the same with signals of command from the flag ship, which will considerably diminish the number of signals perfectly different from each other.

With all these attentions and precautions a system of By what signals is at last made up, fitted to the code of sailing and fighting instructions. It is accompanied by another small set for the duty of convoys. It must be conveyed grooved in two books; one for the officer of the flag ship, who is to make the signals, and the other is... delivered to every private ship. In the first, the evolutions, movements, and other operations of service, are set down in one column, and their corresponding signals in another. The first column is arranged, either alphabetically, by the distinguishing phrase, or systematically, according to the arrangement of the sailing and fighting instructions. The officer whose duty it is to make the signals, turns to this column for the order which he is to communicate, and in the other column he finds the appropriated signal.

In the other book, which is consulted for the interpretation of the signals, they are arranged in the leading column, either by the flags, or by the places of their exhibition. The first is the best method, because the derangement of the flag ship's masts and rigging in time of action may occasion a change in the place of the signal.

The *Tattique Navale* of the Chevalier de Morogues contains a very full and elaborate treatise on signals. We recommend this work to every sea-officer, as full of instruction. The art of signals has been greatly simplified since the publication of this work, but we cannot but admire much of the improvements to it. We believe that the author is the inventor of that systematic manner of addressing the order or effective signal to the different squadrons and divisions of the fleet, by which the art of signals is made more concise, the execution of orders is rendered more systematic, and the commanders of private ships are accustomed to consider themselves as parts of an army, with a mutual dependence and connection. We are ready enough to acknowledge the superiority of the French in manoeuvring, but we affect to consider this as an imputation on their courage. Nothing can be more unjust; and dear-bought experience should long ere now have taught us the value of this superiority. What avails that courage which we would willingly arrogate to ourselves, if we cannot come to action with our enemy, or must do it in a situation in which it is almost impossible to succeed, and which needlessly throws away the lives of our gallant crews? Yet this must happen, if our admirals do not make evolutions their careful study, and our captains do not habituate themselves, from their first hoisting a pendant, to consider their own ship as connected with the most remote ship in the line. We cannot think that this view of their situation would in the least lessen the character which they have so justly acquired, of fighting their ship with a courage and firmness unequalled by those of any other nation. And we may add, that it is only by such a rational study of their profession, that the gentleman can be distinguished from the mercenary commander of a privateer.

II. Night Signals.

It is evident, that the communication of orders by night must be more difficult and more imperfect than by day. We must, in general, content ourselves with such orders as are necessary for keeping the fleet together, by directing the more general movements and evolutions which any change of circumstances may render necessary. And here the division and subordinate arrangement of the fleet is of indispensible necessity, it being hardly possible to particularise every ship by a signal of address, or to see her situation. The orders are therefore addressed to the commanders of the different divisions, each of whom is distinguished by his poop and top-lights, and is in the midst of, and not very remote from, the ships under his more particular charge. Yet even in this unfavourable situation, it is frequently necessary to order the movements of particular ships. Actions during the night are not uncommon. Pursuits and rallyings are still oftener carried on at this time. The common dangers of the sea are as frequent and more fatalrous. The system of signals therefore is very incomplete till this part be accomplished.

Night signals must be made by guns, or by lights, or by both combined.

Gun signals are susceptible of variety both in number and in disposition. The only distinct variation which can be made in this disposition, is by means of the time elapsed between the discharges. This will easily admit of three varieties, slow, moderate, and quick.—Half-minute guns are as slow as can easily be listened to as pertaining to one signal. Quarter-minute guns are much better, and admit of two very distinct subdivisions. When the gunners, therefore, are well trained to this service (especially since the employment of firelocks for cannon), intervals of 15 or 12 seconds may be taken for slow firing, 8 or 10 seconds for moderate, and 4 or 5 seconds for quick firing. If these could be reduced one half, and made with certainty and precision, the expression would be incomparably more distinct. A very small number of firings varied in this way will give a considerable number of signals. Thus five guns, with the variety of only quick and moderate, will give 20 very distinguishable signals. The same principle must be attended to here as in the flag signals. The most simple must be appropriated to the most important orders, such as occur in the worst weather, or such as are most liable to be mistaken. Quick firing should not make part of a signal to a very distant ship, because the noise of a gun at a great distance is a lengthened sound, and two of them, with a very short interval, are apt to coalesce into one long continued sound. This mode of varying gun-signals by the time must therefore be employed with great caution, and we must be very certain of the steady performance of the gunners.

Note, that a preparatory signal or advertisement that an effective signal is to be made, is a very necessary circumstance. It is usual (at least in bad weather) to make this by a double discharge, with an interval of half a second, or at most a second.

Gun-signals are seldom made alone, except in ordinary situations and moderate weather; because accident may derange them, and inattention may cause them to escape notice, and, once made, they are over, and their repetition would change their meaning. They are also improper on an enemy's coast, or where an enemy's cruisers or fleets may be expected.

Signals by lights are either made with lights simply signals by so called, i.e., lanthorns shown in different parts of the ship, or by rockets. Lights may differ by number, and by position, and also by figure. For the flag ship always carrying poop or top-lights, or both, preceits an object in the darkest night, so that we can tell whether the additional lights are exhibited about the mainmast, the foremast, the mizzenmast, &c. And if the lights shown from any of these situations are arranged in certain distinguishable situations in respect to each other, the number number of signals may be greatly increased. Thus three lights may be in a vertical line, or in a horizontal line, or in a triangle, and the point of this triangle may be up, or down, or forward, or aft, and thus may have many significations.

Lights are also exhibited by false fires or rockets: These can be varied by number, and by such differences of appearance as to make them very distinguishable. Rockets may be with stars, with rain fire, or simple squibs.

By varying and combining these, a very great number of signals may be produced, fully sufficient to direct every general movement or evolution, or any ordinary and important service. The Chevalier de Morogues has given a specimen of such a system of night signals, into which he has even introduced signals of address or direction to every ship of a large fleet; and has also given signals of number, by which depths of soundings, points of the compass, and other things of this kind, may be expressed both easily and distinctly. He has made the signals by rockets perfectly similar in point of number to those by lantorns, so that the commander can take either; a choice which may have its use, because the signals by rockets may cause the presence of a fleet to be more extensively known than may be convenient.

The commander in chief will inform the fleet by signal, that guns, or perhaps rockets, are not to be used that night. This signal, at the same time, directs the fleet to close the line or columns, that the light signals may be better observed.

It is indeed a general rule to show as few lights as possible; and the commander frequently puts out his own poop and top-lights, only showing them from time to time, that his ships may keep around him.

The signal lantorns on board the flag ship, and a lantorn kept in readiness on board of every private ship, to answer or acknowledge signals from the commander in chief, are all kept in bags, to conceal their lights till the moment they are fixed in their places, and the preparatory or advertising signal has been made.

The commander in chief sometimes orders by signal every ship to show a light for a minute or two, that he may judge of the position of the fleet; and the admiral's signal must always be acknowledged by those to whom it is addressed.

It is of particular importance that the fleet be kept together. Therefore the leading ships of the fleet, on either tack, are enjoined to acknowledge the signals of the commander in chief by a signal peculiar to their station. Thus the commander in chief learns the position of the extremities of his fleet.

In framing a set of night signals, great attention must be given to their position, that they be not obscured by the sails. The nature of the order to be given will frequently determine this. Thus, an order for the rear ships to make more sail, will naturally direct us to exhibit the signal at the mizen peak; and so, of other pieces of service. Lantorns exposed in groups, such as triangles, lozenges, &c., are commonly suspended at the corners of large frames of laths, at the distance of a fathom at least from each other. Attempts have been made to show lights of different colours; but the risk of mistake or failure in the composition at the laboratory, makes this rather hazardous. Coloured lantorns are more certain; but when the glasses are made of a colour sufficiently intense, the vivacity of the light (which at no time is very great) is too much diminished. Besides, the very distance changes the colour exceedingly and unaccountably.

III. Of Signals in a Fog.

These can be made only by noises, such as the firing of cannon and muskets, the beating of drums and ringing of bells, &c. Fog signals are the most difficult to contrive of any, and are susceptible of the least variety. The commander in chief is principally concerned to keep his fleet together; and unless something very urgent requires it, he will make no change in his course or rate of sailing. But a shift of wind or other causes may make this necessary. The changes which he will order, it will be prudent to regulate by some fixed rule, which is in general convenient. Thus, when a fleet is in the order of sailing upon a wind, and a fog comes on, the fleet will hold on the same course. If the wind should come a little more on the beam, the fleet will still keep close to the wind. Certain general rules of this kind being agreed on, no signals are necessary for keeping the fleet together; and the ships can separate or run foul of each other only by difference in their rate of sailing, or by inaccurate steerage. To prevent this, the commander in chief fires a gun from are in many time to time, and the ships of the fleet judge of his situation and distance by the sound. The commanders of divisions fire guns, with some distinction from those of the commander in chief. This both informs the commander in chief of the position of his squadrons, and enables the private ships of each division to keep in the neighbourhood of their own flag ship. On board of every private ship the drum is beaten, or the bell is chimed, every quarter of an hour, according as the ship is on the starboard or larboard tack. By such contrivances, it is never difficult to keep a fleet in very good order when sailing on a wind. The wind is almost always moderate, and the ships keep under a very easy sail. It is much more difficult when going large, and separation can be prevented only by the most unwearied attention. The greatest risk is the falling in with strange ships steering another course.

But evolutions and other movements are frequently indispensible. The course must be changed by tacking or wearing, and other services must be performed. None, however, are admitted but the most probable, the most simple, and the most necessary.

The commander in chief first informs the fleet by the preparatory fog signal, that he is about to order an evolution, and that he is to direct it by fog signals. This precaution is indispensible to prevent mistakes. Along with this advertising signal he makes the signal of the movement intended. This not only calls the attention of the fleet, but makes the ships prepare for the precise execution of that movement. The commanders of divisions repeat the advertising signal, which informs their ships of their situation, and the private ships beat their drums or chime their bells. Thus the whole ships of the fleet close a little, and become a little better acquainted with their mutual position. It is now understood that a movement is to be made precisely a quarter of an hour after the advertisement. At the expiration of this time, the effective signal for this movement is made by the commander in chief, and must be instantly repeated by the commanders of divisions, and then the movement must be made by each ship, according to the failing and fighting instructions. This must be done with the utmost attention and precision, because it produces a prodigious change in the relative position of the ships; and even although the good sense of the commander in chief will select such movements for accomplishing his purpose as produce the smallest alterations, and the least risk of separation or running foul of each other; it is still extremely difficult to avoid these misfortunes. To prevent this as much as possible, each ship which has executed the movement, or which has come on a course thwarting that of the fleet, intimates this by a signal properly adapted, often adding the signal of the tack on which it is now standing, and even its particular signal of recognition. This is particularly incumbent on the flag ships and the leading ships of each division.

After a reasonable interval, the commander in chief will make proper signals for bringing the fleet to a knowledge of their reunion in this new position.

This must serve for a general account of the circumstances which must be attended to in framing a code of signals. The arbitrary characters in which the language is written must be left to the sagacity of the gentlemen of the profession. It must be observed, that the stratagems of war make secrecy very necessary. It may be of immense hazard if the enemy should understand our signals. In time of battle it might frequently frustrate our attempts to destroy them, and at all times would enable them to escape, or to throw us into disorder. Every commander of a squadron, therefore, issues private signals, suited to his particular definition; and therefore it is necessary that our code of signals be susceptible of endless variations. This is exceedingly easy without any increase of their number. The commandant needs only intimate that such and such a signal is so and so changed in its meaning during his command.

We cannot leave this article without returning to an observation which we made almost in the beginning, viz., that the system of signals, or, to speak more properly, the manner of framing this system, has received much improvement from the gentlemen of the French navy, and particularly from the most ingenious thought of M. de la Bourdonnais, of making the signals the immediate expressions of numbers only, which numbers may be afterwards used to indicate any order whatever. We shall present our readers with a scheme or two of the manner in which this may be done for all signals, both day, night, and fog. This alone may be considered as a system of signals, and is equally applicable to every kind of information at a distance. Without detracting in the smallest degree from the praise due to M. de la Bourdonnais, we must observe, that this principle of notation is of much older date. Bishop Wilkins, in his Secret and Swift Messenger, expressly recommends it, and gives specimens of the manner of execution; so does Dr Hooke in some of his proposals to the Royal Society. Galpar Schottus also mentions it in his Technica Curiosa; and Kircher, among others of his Curious Projects.

M. de la Bourdonnais's method is as follows:

He chooses pendants for his effective signals, because they are the most easily displayed in the proper order. Several pendants, making part of one signal, may be hoisted by one halyard, being stopped on it at the distance of four or six feet from each other. If it be found proper to throw out another signal at the same time and place, they are separated by a red pendant without a point. His colours are chosen with judgment, being very distinctly recognised, and not liable to be confounded with the addressing signals appropriated to the different ships of the fleet. They are,

For No. 1. Red. For No. 6. Red, with blue tail. 2. White. 7. White, with blue tail. 3. Blue. 8. White, with red tail. 4. Yellow. 9. Blue, with yellow tail. 5. Red, with white tail. 10. Yellow, with blue tail.

Three sets of such pendants will express every number under a thousand, by hoisting one above the other, reckoning the uppermost hundreds, the next below it tens, and the lowest units. Thus the number 643 will be expressed by a pendant red with blue tail, a yellow pendant below it, and a blue one below the last.

This method has great advantages. The signals may be hoisted in any place where best seen, and therefore the signification is not affected by the derangement of the flag ship's masts and rigging. And by appropriating the smaller numbers to the battle signals, they are more simple, requiring fewer pendants.

As this method requires a particular set of colours, it has its inconveniences. An admiral is often obliged rendered to shift his flag, even in time of action. He cannot much easily take the colours along with him. It is therefore better to make use of such colours as every private ship is provided with. One set of 11 will do, with the addition of three, at most of four pendants, of singular make, to mark 100, 200, 300, 400. Two of these flags, one above the other, will express any number under 100, by using the 11th as a substitute for any flag that should be repeated. Thus the 11th flag, along with the flag for eight or for six, will express the number 88 or 66, &c. Thus we are able to express every number below 500, and this is sufficient for a very large code of signals.

And in order to diminish as much as possible the number of these compound signals, it will be proper that a number of single flag signals be preferred, and even varied by circumstances of position, for orders which are of very frequent occurrence, and which can hardly occur in situations where any obstructions are occasioned by loss of masts, &c. And farther, to avoid all chance of mistake, a particular signal can be added, intimating that the signals now exhibited are numerary signals; or, which is still better, all signals may be considered as numerary signals; and those which we have just now called single flag signals may be let down opposite to, or as expressing, the largest numbers of the code.

This method requires the signal of advertisement, the annulling signal, the signal of address to the particular ship or division, the signal of acknowledgment, the signal of indistinctness, of distress, of danger, and one. Naval Signals

One or two more which, in every method, must be employed.

Another method of expressing numbers with fewer colours is as follows: Let the flags be A, B, C, D, E, F, and arrange them as follows:

| | A | B | C | D | E | F | |---|---|---|---|---|---|---| | 1 | 2 | 3 | 4 | 5 | 6 | | A | 7 | 8 | 9 | 10 | 11 | 12 | | B | 13 | 14 | 15 | 16 | 17 | 18 | | C | 19 | 20 | 21 | 22 | 23 | 24 | | D | 25 | 26 | 27 | 28 | 29 | 30 | | E | 31 | 32 | 33 | 34 | 35 | 36 | | F | 37 | 38 | 39 | 40 | 41 | 42 |

The number expressed by any pair of flags is found in the intersection of the horizontal and perpendicular columns. Thus the flag D, hoisted along with and above the flag F, expresses the number 40, &c. In order to express a greater number (but not exceeding 84) suppose 75, hoist the flags E, which expresses 33, or 75, wanting 42, and above them a flag or signal G, which alone expresses 42.

This method may be still farther improved by arranging the flags thus:

| | A | B | C | D | E | F | |---|---|---|---|---|---|---| | 1 | 2 | 3 | 4 | 5 | 6 | | A | 7 | 8 | 9 | 10 | 11 | 12 | | B | — | 13 | 14 | 15 | 16 | 17 | | C | — | — | 18 | 19 | 20 | 21 | | D | — | — | — | 22 | 23 | 24 | | E | — | — | — | — | 25 | 26 | | F | — | — | — | — | — | 27 |

In this last method the signification of the signal is totally independent of the position of the flags. In whatever parts of the ship the flags D and E are seen, they express the number 23. This would suit battle signals.

Another method still may be taken. Flags hoisted anywhere on the foremast may be accounted units, those on the mainmast tens, and those on the mizzenmast hundreds. Thus numeral signals may be made by a ship dismasted, or having only poles in their place.

Many other ways may be contrived for expressing numbers by colours, and there is great room for exercising the judgment of the contriver. For it must always be remembered, that these signals must be accompanied with a signal by which it is addressed to some particular ship or division of the fleet, and it may be difficult to connect the one with the other, which is perhaps shown in another place, and along with other executive signals.

One great advantage of these numeral signals is, that they may be changed in their signification at pleasure. Thus, in the first method, it can be settled, that on Sundays the colours A, B, C, D, &c. express the cyphers 1, 2, 3, 4, &c., but that on Mondays they express the cyphers 0, 1, 2, 3, &c., and on weekdays the cyphers 9, 8, 7, 6, &c.; and so on through all the days of the week. This means of secrecy is mentioned by Dr Hooke for the coast and alarm signals, where, by the by, he shows a method for conveying intelligence over land very similar to what is now practised by the French with their telegraph.

It is equally easy to express numbers by night signals. Naval Sig. Thus M. de la Bourdonnais proposes, that one discharge of a great gun shall express 7, and that 1, 2, 3, 4, 5, 6 shall be expressed by lights. Therefore, to express numbers 24, we must fire three guns, and show three may be also lights. This is the most perfect of all forms of night signals, and of exhibiting lights may be varied to a sufficient extent with very few guns or lights, and with great distinctness.

Thus, for guns. Let F mark the firing of a single gun at moderate intervals, and ff a double gun, that is, two discharged at the interval of a second. We may express numbers thus:

| | I | F | |---|---|---| | 1 | F, F. | | 2 | F, F, F. | | 3 | F, F, F, F. | | 4 | F, f, f. | | 5 | F, f, f, f. | | 6 | F, f, f, f, f. | | 7 | F, f, f, f, f, f. | | 8 | F, f, f, f, f, f, f. | | 9 | F, f, f, f, f, f, f, f. | | 10 | f, f, f, f, f, f, f, f, f, f. |

It might be done with fewer guns if the ff were admitted as the first firing. But it seems better to begin always with the single gun, and thus the double gun beginning a signal distinguishes the tens, &c.

In like manner, a small number of lights will admit of a great variety of very distinct positions, which may serve for all signals to ships not very remote from the commander in chief. For orders to be understood at a very great distance, it will be proper to appropriate the numbers which are indicated by signals made with rockets. These can be varied in number and kind to a sufficient extent, so as to be very easily distinguished and understood. It is sufficient to have shown how the whole, or nearly the whole, notation of signals may be limited to the expression of numbers.

We have taken little notice of the signals made by concluding private ships to the commander in chief. This is a very easy business, because there is little risk of confusing them with other signals. Nor have we spoken of signals from the flag ships whose ultimate interpretation is number, as when ships are directed to change their course so many points. Those also are easily contrived in any of the methods already described; also when a private ship wishes to inform the commander in chief that soundings are found at so many fathoms. In like manner, by numbering the points of the compass, the admiral can direct to chase to any one of them, or may be informed of strange ships being seen in any quarter, and what is their number.

Signals by the Drum, made use of, in the exercise of the army, instead of the word of command, viz.

**Signals**

- **A short roll**, - To caution. - **A drum**, - To perform any distinct thing. - **To arms**, - To form the line or battalion. - **The march**, - To advance, except when intended for a salute. - **The quick march**, - To advance quick. - **The point of war**, - To march and charge.

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**Operations**

- **To caution**. - **To perform any distinct thing**. - **To form the line or battalion**. - **To advance, except when intended for a salute**. - **To advance quick**. - **To march and charge**. Signature, The retreat, - To retreat. Drum ceasing, - To halt. Two flares rolls, - To perform the flank firing. The dragon march, - To open the battalion. The grenadier march, - To form the column. The troop, - To double divisions. The long roll, - To form the square. The grenadier march, - To reduce the square to the column. The preparative, - To make ready and fire. The general, - To cease firing. Two long rolls, - To bring or lodge the colours.