Map: Plan of Wissahickon Valley showing properties contiguous to Fairmount Park and the boundaries thereof. Approved July 1896, Russell Thayer, Chief Engineer. Scale: 400 feet to 1 inch. [Print on linen-backed paper. Property owners and boundaries marked in colored ink. Very brittle, folded small, missing front board.], 1896, Shelf: 2. Books and Bound Manuscripts, FP.2016.004. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/13800 Accessed July 27, 2025.