Coordinates given above concern the larger map. Foxed, creased, frayed, and 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. In ink on verso: "No 21". Includes text: "See AB No. 8". Military topographic maps. The larger one covers the towns of North Castle and Harrison in Westchester County, New York; it shows roads running from White Plains through Purchase; King Street runs along the modern border between New York and Connecticut. The smaller map has not been identified. Both also show buildings and owners’ names, landforms and streams. No watermark. Pen-and-ink, pencil on laid paper. Shows relief by hachures. 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: Guthorn, Peter J. American Maps and Map Makers of the Revolution, p. 17-22.