Allegheny Square (Presently Campbell Square): Plan for laying out the walks in Allegheny Square: 25th ward (emphasis on lighting). Department of Public Works, Bureau of Surveys. Signed by John C. Lewis, City Forester and Landscape Gardener, Bureau of City Property. [ID: 12B-565; PWD ERV: 1075975; Drawing No.: 6991], c. 1890, Drawer: N1, Folder: 2.1. Philadelphia Water Department 12B - Drawings Donation, FP.2019.002. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/4869 Accessed April 20, 2025.