Plan showing proposed retaining wall along the westerly shore of the Wissahickon Creek and northerly shore of the Schuylkill river from Betze's Bridge to the park line. [1 sheet], 1896, Drawer: W23 & W24, 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/49922 Accessed April 20, 2025.