Part of the Frick Collection Archives Repository
#2: Mortgages - Markle family, 1887-1889, Box: 3, Folder: 8. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives.
#2: Mortgages - Markle family, 1887-1889, Box: 3, Folder: 8. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/8077 Accessed February 26, 2025.
