The mountain turned out to be the culminating point of the Shewits Plateau.

None of us visited it at that time, but Thompson went there later, and I crossed its slopes twice several years afterward.

On the summit is a circular ruin about twenty feet in diameter with walls remaining two feet high.
It will be remembered that we had left one of our boats near the mouth of the Dirty Devil River.

A party was to go overland to that point and bring this boat down to the Paria, and on the 25th of May (1872) Thompson started at the head of the party to try to explore a way in to the mouth of the Dirty Devil, at the same time investigating the country lying in between and examining the Unknown or Dirty Devil Mountains which had been seen from the river, just west of the course of the Dirty Devil River, now named Fremont River.

We went west to a ranch called Johnson after the owner, thence north-westerly, passing the little Mormon settlement of Clarkson, and then struck out into the wilderness.
Keeping a north-westerly course we crossed the upper waters of the Paria and made our way to the head of a stream flowing through what was called Potato Valley, and which the party of the previous year had followed down, endeavouring to find a trail by which to bring rations to us, under the impression that it was the head of the Dirty Devil.