Sir George Ballingall [(1780-1855], Cheltenham, to John Milton Esqr, November 25, 1850, Box: 1, Folder: 1. Spottiswoode & Robertson collection, MS 186. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248796 Accessed December 11, 2024.