Soap
Part of the Frick Collection Archives Repository
May's (Pittsburgh, Pa.), undated, Box: 33, Folder: 26. Henry Clay Frick Papers, Series IV: Receipts, FFP.01.04. Frick Collection Archives.
May's (Pittsburgh, Pa.), undated, Box: 33, Folder: 26. Henry Clay Frick Papers, Series IV: Receipts, FFP.01.04. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/7167 Accessed December 10, 2025.
