Record Book, Cobb's creek Park Guard reports. Includes disc of electronic version, introduction written by Joseph Callahan and biographical note on John Patrick Callahan, Fairmount Park guard stationed at Cobb's Creek, 1945-1952, Shelf: 6. Books and Bound Manuscripts, FP.2016.004. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/13760 Accessed April 20, 2025.