Correspondence between Alan Corson, Chief Engineer of Fairmount Park, and John C. Knox, Vice President of National Bank of Germantown and Trust Company, regarding telephone service at Loudoun Mansion as well as Miss Logan's bequest, 1939 November, Drawer: 4-2. History Files, FP.2010.001.006. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/405660 Accessed June 08, 2025.