Signed: R. Scot, sculp. Philad. 1782. At left bottom: "Note. The land within the doted lines has been laid down by survey." "This plan was taken between the 22nd & 28th of October, 1781." Relief shown by hachures. Includes "References to the British lines" with illustrations of ships and "Explanation" of the American and French siege operations. One of the most important map of the American Revolution; Bauman's plan provides detail of the topography, fortifications, siege works, positions of the American and British lines and headquarters of the commanding officers during the siege of Yorktown. At the center of the map: "The field where the British laid down their arms." Major Bauman was an original member of the NY Society; Robert Scot was the engraver of the text on the Society's diploma plate. Scale ca. 1:14,400.