This celebrated river takes its rise in the Himalaya Mountains, at the south-western base of the group called the Jumnotri Peaks, at an elevation of 10,849 feet above the sea-level, and in Lat. 31., Long. 78. 32. It first holds a course, for about 100 miles, in a S.W. direction, through the mountainous districts of Gurhwal and the Dehra Dhoun, during which it receives the waters of the Berai-Ganga, the Buddeear, Comalda, Rickna, Khootnee, Aglar, Tonse, Girce, and Asna. From the point of its confluence with the last named stream, the Jumna takes a direction, first westerly, then southerly, and flowing through a ravine in the Sewalki Mountains, it enters the plains of Hindustan in Lat. 30. 20., Long. 77. 38. After emerging from the mountains, it flows off the Delhi and Doob Canals, the former issuing from its right, and the latter from its left bank. It then directs its course in a parallel line to that of the Ganges, until, after passing the cities of Delhi and Agra, it falls into the Ganges at Allahabad, in which, as the holier and rather the larger stream, its name is absorbed. Between Delhi and Allahabad the Jumna receives the waters of many considerable streams, among which may be enumerated the Chumbul, the Sind, the Betwa, and the Cane. Jacquemont styles the Jumna in the lower part of its course, an enormous river; in the rainy season, it is in some places a mile in width, with a very rapid current. The total length of this river, from its source to its confluence with the Ganges at Allahabad, is 860 miles. The streams at the junction are nearly equal in volume; the Ganges, the deeper, with yellow water; the Jumna, the more rapid, with water as clear as crystal, but considered less palatable and wholesome than that of its fellow. The confluence of the two rivers takes place in Lat. 25. 26., Long. 81. 45. The Jumna is only useful as a military barrier to the British territories during the rainy season, when all field operations are impracticable. At this period it may be navigated by flat-bottomed boats of considerable burden; but at other times it is of no utility to commerce. Above its junction with the Chumbul, or 10 miles below the fort of Etayeh, it is fordable, except for a few weeks during the rainy season. From Calpsee to its junction with the Ganges there is no obstruction, and only one place where, in the dry season, the passage is rendered difficult by a bank of limestone. It is mentioned by Bishop Heber that its waters act on strangers like the Cheltenham waters.