North FORELAND, in the isle of Thanet, Kent, of which it is the N. E. point, is the promontory ascertained by act of parliament to be the most southern part of the port of London, which is thereby extended N. in a right line to the point called the Nase on the coast of Essex, and forms what is properly called the Mouth of the Thames. A sea-mark was erected here by the Trinity-house corporation at the public expence, which is a round brick tower, near 80 feet high. The sea gains so much upon the land here by the winds at S. W. that within the memory of some that are living about 30 acres of land have been lost in one place. All vessels that pass on the south side of this head-land are said to enter the Channel, which is the name for the narrow sea between England and France; and all the towns or harbours between London and this place, whether on the Kentish or Essex shore, are called members of the port of London.