Aug 11 11 1/2 mi NE Chama, 10,000 ft, Rio Arriba Co. New Mexico. We left Berkeley on the 4th but owing to various delays, auto accident etc. we only arrived here late yesterday afternoon. This country is only a few miles south of the Colorado line. We entered this place from Cumbres Pass, Colorado. We are about a mile or so from the uppermost reaches of the Rio Brazos. The countryside consists almost entirely of Spruce (sp?) with a great deal of open grassy meadow. I cannot decide what determines the distribution of the Spruce and grass, nether slope, exposure or altitude appear to have much to do with it. I set out 43 museum special mouse traps last night, the resultant catch, 1 Peromyscus maniculatus. He was taken in the spruce forest. We are camped beside a small stream which ultimately joins the Brazos, after cutting to the south. We are just at the edge of a considerable stretch of Spruce, and a smallish patch of grass. Part of that is boggy with distinctly different vegetation. This site is part of the Carson National Forest, but the Brazos itself is on private land. All of this country is grazed by sheep. Their footprints and excrement are everywhere. However, they