Part of the Frick Collection Archives Repository
#1: Bills Receivable - Registered mail insurance, 1915, Box: 1, Folder: 9. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives.
#1: Bills Receivable - Registered mail insurance, 1915, Box: 1, Folder: 9. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/8040 Accessed January 09, 2026.
