the two "branches" of the family will continue to drift apart. July 13th. All day each adult attended to its own bird, ignoring the other. Brownie was heard in full song about 9:30 A.M., keeping it up for several minutes with frequent pauses. B and Bb again selected new roosting places for the night. July 14th. Brownie and Bb have come to the oval lawn and remain much in that neighborhood. Brownie has begun to sing undersong while pecking about there, waiting to see what I would do about worms. Bb also tried his hand at a little warbling song. All four birds seem to remain on the place. I have made no attempt to tame either youngster. July 15th. The thrashers still keep to two groups. July 16th. Ditto, except that at 7:30 P.M., about time to hunt roosts, Nova's bird saw me giving worms to Brownie, flew down from the old oak and followed B to where he was feeding Bb, about 40 feet away. He then approached Brownie for food, but the latter shadow-boxed with him and would not give him any. I gave B 2 more helpings, both of which he passed on to Bb, although Nb was much nearer and more anxious for food. July 17th. The line of cleavage still remains, though all four birds remain on the premises. July 18th. Bb responds At 9:30 A.M. one of the young birds was in the glade alone, so I decided to see what I could do with him without the assistance of Brownie. He was about 15 feet away in the bushes. I tossed a worm which landed near him, and he promptly took it. I tossed a succession of worms nearer to me, each of which he took. The fifth worm I held