Letter from A.C. Mullin, Secretary of the Pennsylvania Board of Centennial Managers, acknowledging receipt of the Resolution from the Fairmount Park Commission accepting the Pennsylvania State Building and its furniture to be held as property of the City of Philadelphia, 1877 May 7, Drawer: 8.2. History Files, FP.2010.001.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/405718 Accessed April 20, 2025.