Gymnogyps californianus March 17, 1946. Hopper Canyon, G.I.F. watched this bird from about a half mile - it held head low as if feeding at flat & went back in cave several times, each time apparently settling [rest 12] down with a shimming motion as if on an egg. No eating of the weak old first carcass yet. March 18, 1946. Hopper Canyon, G.I.F. Calm cold night (first). at 8 a.m. fog up lower Hopper Canyon at about 3500 ft. level. We left camp at about 9 a.m. & went to Parking Place. Fog came up the canyon & engulfed us. We built a blind of sheet metal under some bushes in Big Meadow. Fog gradually lifted above the Rim. At 11:43 one condor soared over us heading S.E. Breeze was light, air cool. We saw 3 then perched atop Arundell Ridge on Saddle Pt. One flew to High Pt. near Flat Pt.. At 12:15 we saw 6 circling over Arundell Ridge, rising & more perched. They worked up the slope to near Pyramid L.O. & headed S.E. We saw 7 at about 12:23 from Parking Place. Two were adults, one a near adult, & 4 imm. aturs. They circled close (100 ft.) over us soaring slowly. 3't birds had missing #t-4 or 5 primary. One min. had feet down. Ceiling was about 200' overhead. The two adults came together - one chased the other briefly. The adults & 1 min. slid S.E. toward the residue of others