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C. Preliminary map of a portion of the central part of the unknown country indicated by the blank space on Map [A] at page 95, showing the Kaibab Plateau, mouth of the Paria, Echo Peaks, House Rock Valley, and the course of part of Glen Canyon and of Marble Canyon and the Grand Canyon to the mouth of the Kanab Canyon. El Vado is at the western intersection of the 37th parallel and the Colorado River, and Kanab is in the upper left-hand corner of the map—just above the 37th parallel which is the boundary between Utah and Arizona. The words "Old Spanish Trail from Santa Fé to Los Angeles" near El Vado were added in Washington and are incorrect. The old Spanish trail crossed at Gunnison Crossing far north of this point, which was barely known before 1858.

Friday the 13th, the next day, was my birthday and Mrs. Thompson, who was always striving to do something to make our circumstances pleasant, prepared a large peach pie with her own hands in celebration. The Major and Jones having come in the night before, we passed most of the time that day in a large tent eating melons, the Major acting as carver of the fruit. When we had eaten a watermelon he would declare that he thought muskmelon far better. We all agreed. He would cut one only to find when we had eaten it that we had changed our minds and wanted watermelon, which see-saw opinions we kept up till all the melons were gone. It would be impossible for any one who had not had our canyon fare to appreciate the exhilarating effect of this fresh fruit.

My leg, which had developed the pain coming up the Kanab Canyon, now swelled till it was almost the same size throughout and any pressure made an imprint as in a piece of putty. No one knew what to make of it. I rode over to Johnson's, that person being the nearest to a doctor of any one in the country, though the Mormons do not much believe in medicines, and he gave me a liniment to apply. This did no good. In a few days the swelling disappeared except where the spot of keen pain was, and there a lump was left half as large as a man's fist, with two small red spots in the middle of it. I now concluded that these spots marked the bite of a tarantula that must have gotten in my blankets at Shower-Bath Spring. Suppuration set in at the spots where the flesh turned black and all the men said it was a bad-looking wound. They thought I would lose my leg. I concluded to poultice it to draw out any poison that remained, and kept bread-and-milk applied continuously. After a while it seemed to have a tendency to heal.

We ran the base line up through Kanab and at the head of it pitched a small observatory tent over a stone foundation on which Prof, set up a large transit instrument for stellar observations. He got in connection, by the telegraph, with Salt Lake City and made a series of close observations. I began an hourly set of barometrical readings and as soon as Clem came back he helped me to run them day and night for eight consecutive days. Jack meanwhile was preparing for a trip to the Moki Towns, the Major and Jones had gone off for some special work, and Andy started with a waggon for Beaver to bring down rations. Occasional bands of trading Navajos enlivened the days and I secured five good blankets in exchange for old Yawger, who was now about useless for our purposes. Prof. gave him to me to get what I could for him, and he also gave Clem another derelict for the same purpose. On the 9th of October Jack, Andy, and Clem, started with Jacob on his annual trip to the Mokis by way of Lee's Lonely Dell while Jones went north to Long Valley on the head of the Virgin, for topography. The Major on foot, with a Mormon companion and a Pai Ute, explored from Long Valley down the narrow canyon of the Virgin to Shunesburg, about 20 miles, a trip never before made.[37] The canyon is about two thousand feet deep and in places only twenty or thirty feet wide, twisting in such a way that the sky was not visible at times, and the stream often filled it from side to side so that they had to swim.

The Grand Canyon.