... mouth of the Big Witchita, where they crossed Red River. Proceeding westward, between Red River and a branch of Cache Creek, they struck the north fork of Red River at the west end of the Witchita Mount ains, and followed that stream to its source in the Llano Estacado, or Staked Plain. Here an excursion was made to the valley of the Canadian River, at Sand Creek, in order to verify the position of...