Foxed, strongly stained, creased 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 pencil on recto: "No 122". Military topographic map. Covers an area now within New York City and Yonkers, New York. Shows buildings and owners’ names, landforms and streams. Pen-and-ink, pencil on laid paper. Shows relief by hachures. Title proper from recto and pencilled title on verso the work of editors subsequent to 1820. Inked title "The Envir..." from verso is contemporaneous with map but mostly lost to cropping. Index title, statement of responsibility, series title and series numbering also contemporaneous, but on separate index sheet filed at head of series. Watermark: "J WHATMAN".