Hendrickson 1950 Journal Aug. 28 Lower Corvinton Flat, 5000 ft., Riverside Co., Calif. (about 3 gal.), I observed that the coarse gravel in which the water is contained allows a rapid flow into the depression. The 3 gal. were removed in about 10 min. time, and the level did not recede noticeably. On cleaning out caved-in sand, if a double handful of sand is removed near the water line, the depression left is filled with water when the next double handful is taken out (a few seconds later). At about 8:30 P.M. checked tunnel at Corvinton Springs - no bats, traps undisturbed. - At about 10:30 A.M. today, at my water hole, saw what I am almost certain was a Red-Breasted Nuthatch. Aug. 29 Temp at 6:00 A.M. on ridge about 25 ft. above wash bottom = 16.8°C. On 1st ridge S. of camp, and almost opposite camp, is U.S. General Land Office bench-mark which is numbered 161 and has the following other figures on it: ¼ 56/57 Checked stock in 1st wash S. of camp (nothing) and took them up,