Part of the Frick Collection Archives Repository
#40: F.J. Osterling [empty envelope], undated, Box: 10, Folder: 2. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives.
#40: F.J. Osterling [empty envelope], undated, Box: 10, Folder: 2. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/8145 Accessed February 26, 2025.
