One morning Aunt Dorothy waked up very early. She looked out of her eastern window and saw that the sky beyond the lake was a beautiful rose color, but the sun was not yet risen. Aunt Dorothy was sleepy, so she closed her eyes again, but just as she did so she heard a strange twittering noise and wondered where it came from. Her curiosity was so great that she could not go to sleep again, so she rose and dressed herself and, after saying a little prayer to the great All-Father to keep her through the day, she went to find out what the noise was. But she had already thought that it must be birds in the chimney. She climbed up on a chair and listened near the chimney hole. Soon she heard a fluttering of wings and a chirping. Mamma Swift was coming with some worms for her babies' breakfast. Her babies, like a great many girl and boy babies, waked up very early in the morning and were quite troublesome. In order to quiet them, Mamma Swift was forced to find some worms before sunrise. Aunt Dorothy was delighted. If she made a little noise near the chimney hole the baby birds thought it was their mother coming with food for them, and they stretched their heads up out of the nest, so Aunt Dorothy could see them. Often, when she was writing or reading in her room she could hear the birds in the chimney. She knew the papa and mamma bird had to work very hard, for they came many, many times a day with food for the baby Swifts. But there came a day when the nest in the chimney was empty, for the little birds had gone away with their parents and were learning to fly through the trees and to catch insects to eat. It made Aunt Dorothy lonesome to sit in her room after that, and instead she used to go out of doors where she could watch the birds. One day she took a fire-shovel and with it managed to loosen the nest and take it out of the chimney without breaking it. The shape of it was like half of a deep saucer, and it was made principally of the petioles or stems of grapevine leaves laid across each other as the logs are in building log houses. The big ends of the leaf stems alternated with the small ones and stuck out, making a bristling outside wall for the nest. There were two or three very slender cedar twigs no bigger than a darning-needle used in making the nest, and these the birds had brought from a long distance. The nest looked as if it had been covered with glue, and this was because the birds had covered it with their saliva and that held the leaf stems together just as glue would. Aunt Dorothy knew a man who went to some islands in the Pacific ocean, where the Pigmy Swifts live. Pigmy means little, and these Swifts are smaller than the ones who built in Aunt Dorothy's chimney. The Pigmy Swifts build their nests in caves. Some of them build very far in the caves, where it is entirely dark. Aunt Dorothy's friend went one day with another man to a cave to get some bird's nests.