Nerdrickson 1950 Journal Aug. 23 Lower Covington Plate, 5000 ft., Riverside Co., Caly. Camp. It scooped under a rock at the base of the tree. At 4:00 P.M. went out with Ward Russell to set two steel traps for coyote in first wash S. of camp. Found Crotalus mitchelli on horizontal rock surface about 6" above sand of wash bottom. The rock on which the snake rested was under a N-facing overhang of a large boulder: [illegible] The snake was not in a "dish-mat" coil, but was in a zig-zag coil: [illegible] Its head was resting on the rock and it made no move until moved. 8:00 P.M. temp.-23.3°C. At 9:00 started walking (with headlight) down road to Covington Well, 9:30 temp. at windmill-22.4° C. Heard poorwillie down canyon. Returned to camp without sighting reptiles or other vertebrates. 10:00 P.M. Temp.-21.9°C. Aug. 24 4:30 A.M. temp.-17.4°C. 5:45 A.M. temp. 18.42. 7:45 A.M. temp.-22.4°C. Left camp at about 5:00 A.M. and walked down canyon below Covington Well. Canyon narrows progressively with descent and at some points there is no sandy floor- only boulders and/or bedrock. About 3/4 mile down from