Penn Treaty Park: Plan of proposed public park on the site of the William Penn Treaty Grounds. Department of Public Works. [ID: 12B-552; PWD ERV: 1075988; Drawing No.: 2512], c. 1890, Drawer: N8, Folder: 3.1. Philadelphia Water Department 12B - Drawings Donation, FP.2019.002. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/4856 Accessed April 20, 2025.