Mr. Henshaw is now chief of the biological survey in the United States Department of Agriculture, to whom I am indebted for many agreeable experiences and for most of my knowledge concerning most of the birds and animals herein mentioned. His contributions to the National Geographical Magazine are particularly interesting and instructive. The rat mentioned is also one of the varieties of what is known as pack-rats. They construct a nest of sticks and other rubbish found in the neighborhood, and if near a house may carry off spoons or knives or anything that attracts their attention. There is a smooth tailed rat belonging to this genus that is very abundant in New Mexico and is apt to leave something in place of the article he carries away, and on that account is often called the swap-rat. General Alexander and some other officers from the post at Fort Garland came to our camp the latter part of July. Complaint had been made by cattlemen, really some Englishmen by the name of Hamilton, that some of their cattle had been killed and they blamed the escort that accompanies the engineers for their death. Mr. Delaney, who came with the general, and I were detailed to go to Antelope park, where the ranch was located, and investigate the matter. The general and some other officers accompanied us as far as Wagon-wheel Gap and with a small escort we continued on to the park, the general and other officers returning to camp. We found the Hamilton brothers very cordial and hospitable. We talked the business over quite thoroughly and remained until near midnight before returning to our camp a short distance away. The following morning we found a half-inch or more of ice in a cup that had been left with some water in it the night before, rather cool weather I thought for the 30th of July. It was very chilly riding for the first two or three hours in the morning, but the sunshine finally got the better of the cold, and we were comfortable for the balance of the day. We camped at Wagon-wheel Gap the following night and found it an interesting place, although there was but one log building and that unoccupied, in the place. The river here makes a great circular bend around an almost perpendicular wall of rock that I judged to be about a half-mile high. Across the river from this was a beautiful valley sloping gradually up into the mountains and in it were many hot springs varying in temperature from barely tepid to boiling hot.