Letter from P[aul?] Tchitchagoff, November [18,] 1807 (St. Petersbourg [St. Petersburg]), Box: 24, Folder: 22. Letters, literary manuscripts, and personal papers of the Porter family, MS 28. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/467267 Accessed May 04, 2024.