Imperfect: separate piece of original (laid paper) lost from lower left corner; note evidence of pasting. In ink on verso: "No. 51." "Rough Draughts". In pencil on recto: "No 51". In pencil on verso: "Fort Washington." Military topographic map. Covers the towns of Chester, Blooming Grove, Cornwall and New Windsor in Orange County, New York. Shows roads running through Vailsgate, Meadowbrook, Salisbury Mills, Washingtonville, Blooming Grove, Craigsville, Chester and East Chester. Also shows buildings and owners’ names, landforms and streams. No watermarks. Pen-and-ink, later pencil on two pieces laid paper. The larger part of the upper right piece is improperly assembled to the others and needs to be rotated ninety degrees so that the compass rosette now at left sits at top; note chainlines as well as geography. Wove finish on third piece. Shows relief by hachures. Stained, foxed, creased, cut and badly abraded. Mounted on cloth, bound and cropped, disbound and silked by subsequent owners. Cleaned after removal of backings 1999; some fill remains. Sheathed in mylar. Partly lined with China paper. Title and number also on verso. Title proper from recto is the work of a later editor--Simeon DeWitt or his assign--subsequent to 1820. Title from verso is in Erskine’s hand and may be cited as such. Index title, statement of responsibility, date, series title and series numbering also by Erskine, but on separate index sheet filed at head of series. References: Heusser, Albert H. George Washington’s Map Maker, p. 249-256.