Hendrickson 1950 Journal Aug. 29 Black Rock Spring, 4500 ft., San Bernardino Co., Calif. Made camp by about 3:00 p. M., about '¼ mile above the spring. A small amount of water is in the spring, although a nearby concrete watering trough is dry. A 55 gal. drum supplying a sardine tin (?) as a "guzzler" also had water. This is located about 200 yds. up the canyon from the spring. The canyon is a fairly narrow one from the spring on up past our camp, with some fairly rocky areas in a sand-gravel hilly slope of the mountains. The canyon bottom and bottom of many of the side canyons are sandy. A number of mosquitoes grow in the canyon bottom and on the low slopes in the vicinity of the spring, and a few milfoeeds (?) were noted in the sandy area near the spring. The spring consists of a rock-lined depression beside the road (in the canyon bottom) at the end of a minor ridge ending between the main canyon and a side canyon. I set a steel trap by the spring. Jerry Russell, hunting late up-canyon from camp, collected a small Crotalus mitchelli this evening. Aug. 30 Hunted, with Jerry Russell, near the spring until about 9:00 A. M. Many Caly. Jays seen; they appeared very tame compared