nesting material of mixed character. B took his to the location in the old oak, Sta.C, and G hers to the dormitory tree and placed it at B's night roost, Sta. D. Brownie then joined her there, as I discovered on arriving, and both were sitting quietly a few inches (at 10:15) apart absolutely without motion. 7 minutes later I had another look at them and could not see that they had changed position at all. At 10:18, still no change. At 10:23 one bird had gone. I heard it calling down in the chaparral. The other joined it, but in a few minutes both were back again at Sta. D, where I left them working on the growing twigs. At both of these stations they have ignored my foundation work of wire screens. (Temp. 55, intermittent sunshine). At 11:08 I went to Sta. D, Brownie, about 4 feet over my head, was struggling to get a loose twig up to the nest site, walking across my foundation in the process. I went off 40 feet and sat down Both birds went in and out of the tree frequently for several minutes, at times carrying twigs up. I could hear them shaking the branches and the ends of the branches above the wind screen plainly moved. One of them came out with a long twig in its bill--from the nest-- and sat on the screen looking off over the country. It then returned whence it had come and the branches again began to shake. When it had quieted down, neither bird was to be seen in the tree I went to the glade and sat down. Both birds came out of the bushes without being called and, for a short time--also for the first time-- B sat on one knee and G on the other. B's talk while there fre- quently verged on song. This session ended with renewed nesting activity, but this time it was Greenie that took a twig to C and B took his to D--just the reverse of the preceding episode. However, as before, both ended up at C. and at 11:25 they were working there. From the ground nothing can be seen at either place as a result of their efforts. Thrasher on each knee.