times. The left leg is improving, but not the foot. Dec. 18th. S's eyes nearly closed. Both eyes were nearly closed early in the forenoon. On the left side the swelling extends to the corners of the mouth. He still seems to like to have his eyes and legs worked on, remaining perfectly quiet during the operation. The adults do not appear to leave the place at all now and hang about the glade and the oval lawn, doing no digging in the latter. This morning both were very talkative when they came for worms and B's frequent thrush imitation. B has been singing undersong full of imitations, the russet-backed thrush song being frequently used--audible about 100 feet. Dec. 19th. "Operation" on eyes of S. I spent three hours this morning, working on the eyes of the young thrasher with four brushes of differing degrees of softness, warm water, tweezers and castor oil, with a little very dilute mercuric cyanide. The result is that he has now two full sized, round eyes with flexible lids that can be closed and moved freely for the first time in many weeks. Incidentally, also, the feathers about the eyes came off with the dried mucus, food, lint, down, etc. which formed a crater- like cone about each eye. He seemed to enjoy the operation and moved only when hungry or thirsty or when he heard some noise in which he was interested; even when feathers came out, he held his head still. S sings. This seems remarkable to me.(1:15 P.M. The little fellow is out in the cloister and is singing. I heard his song above the sound of this machine, thought it was Brownie and went out to investigate). The films on the corneas are still there, but do not seem to have increased in area (or diminished). His song was not in the nature of a call, but was a continuous warbling song, deep in tone, with one Wheat you. Picks up worms. After, perhaps, several hundred attempts he managed to pick up and swallow three meal-worms during the course of the day. His judgment of