Ken.
Was this Johnson depot on south side of the Canadian near a place called Tandy- on the map?

This may of been the "old" John Johntson who was a Indian agent-org.the six town Choctaw Indians
in the 1830's re-move-al period to I.T.
At some time he moved south on the Blue River,near Tishomingo.
Sorry don't much about him--good friend to Cooper.