To Gov. John Pope Hennesy from Jonathon Russell Young, San Francisco. Letter of introduction for John A. Halderman. Photocopy, June 18, 1880, Folder: E, item: 1. John A. Halderman correspondence and documents, RH MS P57. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/47655 Accessed May 19, 2024.