Part of the Frick Collection Archives Repository
Volume 4, 1889-1891, Box: 7-8. Henry Clay Frick Papers, Series X: Invoice Books, FFP.01.10. Frick Collection Archives.
Volume 4, 1889-1891, Box: 7-8. Henry Clay Frick Papers, Series X: Invoice Books, FFP.01.10. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/9237 Accessed February 26, 2025.
