Wharton Square: Plan for laying out the Walks in Wharton Square, 36th ward (emphasis on lighting). Department of Public Works, Bureau of Surveys. [ID: 12B-586; PWD ERV: 1075955; Drawing No.: 6993], c. 1890, Drawer: N10, Folder: 5.1. Philadelphia Water Department 12B - Drawings Donation, FP.2019.002. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/4889 Accessed April 20, 2025.