Letter from F.M. Dougherty, Secretary of the Fairmount Park Commission, submitting a note from the Vice President and General Manager of the Philadelphia and Reading Railroad in relation to conference on the depression of tracks, 1890 May 3, Drawer: 8.3. History Files, FP.2010.001.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/405875 Accessed April 20, 2025.