Plan of the revision of lines and grades of a portion of city plan no. 177 bounded by Walnut Lane, Sprague Street, Haines Street, and Boyer Street. [1 sheet], 1955 March 7, Drawer: W5 & W6, 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/49269 Accessed June 08, 2025.