1697  (1929)  . . . about four a clock some plain indians arrived at the fort. . . .
1844  (1955)  The plains Indians are in a state of warfare, and there is a certain degree of danger in a single boat or canoe passing through their country.
1878  He considers the success of this attempt of the Plain Indians to settle down to the routine of the whiteman's life . . . as most successful and gratifying.
1957  For the pedestrian Plains Indians, without a horse, the dog was a beast of burden.