Extended Tail Feathers, or Upi Iyahdeya, a Dakota leader, explained his mistrust of the treaty. You think it a great deal you are giving for this country. I don't think so; for both our lands and all we get for them will at last belong to the white men . . . . You will take this treaty paper home ad show it to the Great Father [the president of the United States], but we want to keep a copy here so that we may look at it and see whether you have changed it. , doesn't trust that the treaty will be followed so he " "