Notes from Wikiquote
California Digital Newspaper Collection, Los Angeles Herald.; appears in proximity to a reference to Jefferson in the 1878 "Notes of a Voyage to California Via Cape Horn", reprinting a 1850 Sacramento advertisment | via Google Books Samuel Curtis Upham, "Notes of a Voyage to California Via Cape Horn: Together with Scenes in El Dorado, in the Year 1849-'50, with an Appendix Containing Reminiscences: Together with the Articles of Association and Roll of Members of "The Associated Pioneers of the Territorial Days of California".. Earliest known variant is from the August 31, 1844 issue of "Niles' National Register", authored by the committee of William C. Bryant, George P. Barker, John W. Edmonds, David Dudley Field, Theodore Sedgwick, Thomas W. Tucker, and Isaac Townsend. | via Google Books.