From Muscanecunk Mountain Past Johnson's Forge to Easton. No 77 C / by Robert Erskine F.R.S. Geogr. A. U.S. and Assistants.

In erased pencil on recto: "No 77 C". Military topographic map. Covers the townships of Greenwich and Pohatcong in Warren County and of Bethlehem in Hunterdon County, New Jersey; also covers part of Berks County, Pennsylvania. Shows roads running through Bloomsbury, Kennedy Mills, Still Valley and Phillipsburg in New Jersey as well as Easton, Pennsylvania. Also shows buildings and owners' names, landforms and streams. 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. Torn, stained and abraded. Mounted on cloth, bound, disbound and silked by subsequent owners. Cleaned after removal of backings 1999; some fill remains. Sheathed in mylar. Watermark: "TMW" accompanied by dove; similar to Gravell and Miller American watermarks nos. 658 and 659.