I'm rather gratified to read that Sam accompanied Bixby up the Missouri 
River on the D. A. January.  I had been just a bit annoyed that such an 
adventurous character as Sam would have missed that opportunity.  It 
does require me to do some serious re-writing on this section of my web 
site, however.  I suppose the Missouri was unsatisfactory to both men, 
"climbing over reefs and clambering over snags patiently and laboriously 
all day long."  I have not seen a reference to their objective location 
but suppose they traveled to St. Joseph.