Part of the Frick Collection Archives Repository
Penrose, Boies, 1904-1919, Box: 73, Folder: 3-4. Henry Clay Frick Papers, Series II: Correspondence, FFP.01.02. Frick Collection Archives.
Penrose, Boies, 1904-1919, Box: 73, Folder: 3-4. Henry Clay Frick Papers, Series II: Correspondence, FFP.01.02. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/4175 Accessed August 16, 2025.
