July 18 Thursday – Orion and Sam left St. Louis on the Sioux City for St. Joseph, Missouri [MTL 1: 122 citing Mollie Clemens’ Journal]. In Roughing It, Sam wrote: 
“— a trip that was so dull, and sleepy, and eventless, that it has left no more impression on my memory than if its duration had been six minutes…”
A. Hoffman gives this date as July 10, 1861 [62]. July 18 seems more likely.