122-M-173: Walter, T.U. - Memorial of Ida and Olivia Walter, Daughters and Heirs of Thomas U. Walter, Deceased, to the Fifty-Fifth Congress of the United States, undated, Box: 12, Folder: 1. Thomas Ustick Walter collection, LAC-122. The Athenaeum of Philadelphia. https://archives.philaathenaeum.org/repositories/3/archival_objects/8411 Accessed April 30, 2026.