28. Documentation of treatment. CCAHA accession # 10.060.1-8 and 10.125.1-3 [93 .tif images. Includes Wissahickon Valley Park maps, Centennial situation plan, Horticultural Hall and Centennial Art Gallery building elevations, maps of Fairmount Park and 1864 “Plan of Ground Appropriated for the Preservation of the Purity of Water.” Treated in 2010 from Conservation Center for Art and Historic Artifacts], 2010 June 24, Drawer: 2-1, Box: 1, Disk: 28. Compact Disk Collection, FP.2016.005. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/1297 Accessed April 20, 2025.