Comparison of thermometers: dry bulb: 45; max-min #1 44-46; max-min #2 44-45; Schultze 4.1°C. *This reading was swinging in shade of tent, and above, but air temp 2" above ground in shade of tree was as above (about 45°). At 0:40 am: 2" above ground in breeze 31-48°; swinging in shade of tree a few feet away 33-51°. Shot one of pairing of Australia sitting 6 miles apart in a top bush. I don't see them on the floor of this valley into the rain but they are not uncommon among the stone walls and Lippia phyllum on the slopes. Hiked up to the west crest looking for hummingbird cave but found no good ones and saw no hummers. Put a max-min thermometer in a fairly deep, east-facing crevice (52° at 5 p.m.) and set about 22 sheen above along the base of cliffs, mostly with nearly bitten by sun shortly after sun had left east-facing slope. Again also was bitten while up on this slope. July 18 Checked the "hummingbird" crevice at 6:05 am [not so hummers actually seen here], minimum was 32° and still raining. The crevice is east-facing, 20 ft tall, 20 ft deep, 10 ft wide at mouth and 6 ft wide where thermometer lay on a shelf 6 ft above floor. Crevice is open to sky down all except last few feet under there is not much growing and another chickenweed-like plant. Snow covers most of the north wall, south wall is bare. Thermometer was on south wall. 20 ft outside the crevice the temp was 22°, sun arrived at 6:30. Returned to camp at 7 and temp rise 11°. Overnight minimum at 5:30 in camp was 5°.