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80 struggle backward from beneath the brooder, up to the edge of the nest and deposit over it that which, remaining within, would have made their home uninhabitable.

From this time forth a third Swift was seen to enter into the care of the nestlings, taking its turn at brooding and feeding. Was this a nurse-maid employed to relieve the overburdened mother, or a kind and helpful friend or neighbor, or the younger and less care-taking of two wives? Who can tell? It was not until the sixth day after hatching that I knew to a certainty how many young birds there were. Then, to my surprise, I found there were five. They had grown to be very clamorous for food. Two, at most three (later but one), were served at one feeding, and the process was after this manner: would drop into the chimney and alight below the nest, her throat bulging with the fullness of captured insects. The little ones that were hungry were alert, for all had learned that a rumbling noise in the chimney, followed by a sound of meant something to eat. After resting a moment, the mother would scramble up over the nest, and, with closed eyes, feel about until she came in contact with an open mouth, whereupon she would place her beak far down the throat, deposit a portion of food, then seek another yawning cavity. No system appeared to be observed in the matter of feeding. The hungriest youngsters made the greatest effort to reach the source of supply. July 1 feathers began to appear. They grew rapidly, especially those of wings and tail, and in a week the bodies were about covered. With feathers came employment, for they must often be dressed, though from a habit of yawning frequently, common to the family, one might be led to believe that time hung heavily on their claws. The nestlings were two weeks old before the eyes began to open, and nearly three before they were much used. But when they were fully open, and the feathers had grown out and were fast becoming sooty instead of black, how winning these young birds appeared! The time had now come to take up exercises preparatory to flying. The young aspirants would stand in the nest and for a time vibrate the wings rapidly, so rapidly that the identity of wing was lost. Two first ventured from home when nineteen days old, clinging to the wall for a short time a few inches from the nest. One afternoon about this time there came a severe and prolonged shower. The rain beat into the chimney, reaching down to the nest. What now did I see? Besides the five grown-up swiftlings, the three adults, packed in and upon the nest, the rain dripping from