Gymnogyps californianus April 12, 1946 Hopper Canyon, Calif. minimum depth being about 4 ft. The floor was level and mainly of fine rock chips rather than fine sand. Scattered on the floor was egg shell fragments of about half an egg. I saw no rock which might have dropped in it. This circumstance indicates that the egg was broken in the nest - the same thing which happened to #11 nest. Found one wing feather below the nest and one on slope beside it. The cliff proved to be about 75 ft. high & the nest cave halfway down. At 9:45 we left the site (Ed Karnian & I). We saw 1 condor perched on Arundell Ridge then. Had seen none in air - but did see a few turkey vultures in very steady flight. By 10:30 a fair W. breeze. By 10:45 we were in the blind at horse carcass. I set out the stuffed doe about 100 ft. from blind on open road, about 20 ft. from the steaming horse. No ravens nor turkey vultures were at the horse carcass. By 12:00 overhead (about 3/4 of a mile) slay hazy but not overcast, 56°F. in cave blind, fair breeze. 12:55, a black-billed magpie pecked at spills of horse carcass. Earle on ravens pecked for a while. Both apparently frightened by camera noises, Neither gave the stuffed doe more than a glance. 1:38 - we saw two condors soaring about 1/2 mile SE & 300' above boat level. 1:40 - 4 condors about 1/2 mile S.