laid out grid 10 x 10 m with 20-m spacing. Lots of two burrows but saw none. Set 100 traps at double. Windy. auto + Seth set M5 and livetrap. Oct 21 1/2 mi W Chalkfields, 14,000 ft. Night clear calm, minus 6°. Rangered at 5:15 a.m.; 2 Eligmodontus q.q. Again at 8: nothing but saw Bolomys multiformis at F 3/4 south of burrow, and L. alticola at J6 running into the bush. Psecheats flew over grid + canoes along river. Counted sets of two - two mounds on grid; 59, but hard to tell which are occupied. The squirrel is not worst, so even fresh digging looks oldish + dry. saw no trees and heard none. auto caught 1 Colomys durilla, Eligmodontus + sublimis. Seth caught 1 Ph. solivensis; 1 Bolomys perlefschii; and Eligmodontus. auto says Ph. sublimis droppings are small spheres, she saw Ph. solivensis eating Zephrids rigidum. Carol notes that the south side of upate is always the dead side. In afternoon (windy) plotted clusters of two diggings and rated them 1 (very fresh, surely today), 2 (fresh, surely lost 2 or 3 days), and older (more than 2 or 3 days). Ignored really old, presumably abandoned ones, at least 28 sets. Oct 22 Night clear, calm. Minus 8°. Grid traps at 5:30 had 6 Eligmodontus, 1 Bolomys, and 1 juvenile Abraxoma (frozen). Auto caught a large Phyllotis darwin in the bush minus 100 yards W of grid. Fawns now includes Ph. darwinii, Ph. solivensis, Colomys durilla, Ph. sublimis; Bolomys perlefschii, Ctenomys sp., and Abraxoma cinerea. The solivensis near the river. Excavated the burrow in part of which the juvenile abraxoma two was caught. A typical 2-ft gray nest a few feet down, but there are 10 yards of tiny red two tunnels.