THIS IS THE SHOULDER STRAP FOR BAG CATALOGUE NO. E378079.
From card: "Given to Dr. James Relfe of Caledonia, Missouri by an Indian chief from Kansas. F. H. Douglas, Oct. 23, 1947 called this piece "Delaware". This is the shoulder strap for bag Catalogue No. 378079."
The Delaware/Lenape were in Kansas circa 1830/1831. The majority were forced to leave Kansas and relocate to Indian Territory/Oklahoma in 1867.