Sept.21st. There was practically no early morning full song, but isolated calls and talk. I took this change as an indication that Brownie was concentrating on his nest and would be found there, so: At 7:50 A.M. I went directly to the dormitory tree and found him there on his nest working quietly. While I watched he came down for another twig, ignoring me completely. At 9 A.M. another visit disclosed no signs of B, but as I was about to leave, he appeared with a twig in his bill, climbed the tree, passed through the glass house (like old times) and placed it carefully in his nest--for his platform is undoubtedly intended as a sub- structure for a nest. B's preoccupation may act to extend Bb's residence here. On my return to the house, Bb, at the ovale lawn, ran about 75 feet to reach me in the upper garden, and ate worms contentedly from the box. When he thought they were all gone he turned his attention to my fingers. During this period he showed no nervousness as to what might be concealed in the surrounding shrubbery--perhaps an indi- cation that B had not forced his attentions on him for some hours. Sept.22nd. Very little early morning song to be heard either here or from a distance, principally isolated calls. Brownie worked spasmodically at his nest during the day--princi- pally in the morning--and sat in it often. Nova occasionally visited him there. There is little observable progress on the structure. Dr. Reynolds and I saw a sparrow-hawk in the top of the old oak eating something. On approaching, it flew and dropped its prey, which proved to be a male linnet--headless. The hawk, a female, to- gether with its mate, circled about the tree several times as if considering a search for the linnet. Sparrow-hawk with linnet.