Military topographic map. Covers the lower Hudson River Valley in New York, New Jersey and Connecticut, from Warwick (N.Y.) and Pompton Plains (N.J.) to New Milford and Danbury (Conn.), and from Newburgh (N.Y.) to Staten Island (N.Y.). Shows roads, buildings and owners’ names, also landforms and streams. Shows relief by hachures. Title proper from recto is the work of a later editor--Simeon DeWitt or his assign--subsequent to 1820. Index title, both statements of responsibility, date, series title and series numbering by Erskine, but on separate index sheet filed at head of series. Pen-and-ink, pencil on laid paper (one principal sheet has small pieces of four others pasted to its upper right). Watermark: "Pz". Faded, stained, foxed, creased, frayed, and badly faded. Cut into two pieces. Mounted on cloth, bound and cropped, disbound and silked by subsequent owners. Cleaned after removal of backings 1999; some fill remains. Sheathed in mylar. May be imperfect; Erskine’s index states "3 pieces &  D[itt]o". Includes texts (severely faded). In pencil on recto: "No 37". In ink on verso: "No 37", "No 37 1st".