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[[underline]]Sept.12[[/underline]]. Continued over dry mesa to Cabezon, a desolate little adobe town on the Puerco, where we lunched, then turned south about 4 miles and camped by a good rain tank at the south base of Cabezon Peak.

This peak is a volcanic neck like the Devils tower only larger and higher but with less perfect basatic [[strikethrough]] form [[/strikethrough]]colums. It is one of some 20 such necks along the Puerco Valley here most of which are smaller but range from 400 to 1000 feet high and all extremely interesting. They are on a level with the Mesa Prieta on the east & the Sierra Chivata on the west & have been left standing in the valley eroded out by the Puerco. The edges or one side of others are seen still half bedded in the mesas.

Grass is good & water is scarce. The pools here & there in the bed of the Puerco are very alkaline. Mexican ranches along the valley are poor, but little crops of corn are raised & a few vegetables