Map of the survey of Wissahickon Creek from its mouth to Paul's Mill Road, defining boundaries of land appropriated by Commissioners of Fairmount Park for the protection of the purity of the water of said creek and preservation of the beauty of its scenery [8 sheets; 1 unique sheet], 1869, Drawer: Wissahickon General, Folder: 3. Wissahickon Valley Park Maps, Plans and Drawings, FP.2011.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/49039 Accessed April 20, 2025.