Johnny and Polly Chuck had made their home between the roots of an old apple-tree in the far corner of the Old Orchard. You know they have their bedroom way down in the ground, and it is reached by a long hall. They had dug their home between the roots of that old apple-tree because they had discovered that there was just room enough between those spreading roots for them to pass in and out, and there wasn't room to dig the entrance any larger. So they felt quite safe from Reddy Fox; and Bowser the Hound, either of whom would have delighted to dig them out but for those roots. Right in front of their doorway was a very nice doorstep of shining sand where Johnny Chuck delighted to sit when he had a full stomach and nothing else to do. Johnny's nearest neighbors had made their home only about five feet above Johnny's head when he sat up on his doorstep. They were Skimmer the Tree Swallow and his trim little wife, and the doorway of their home was a little round hole in the trunk of that apple-tree, a hole which had been cut some years before by one of the Woodpeckers. Johnny and Skimmer were the best of friends. Johnny used to delight in watching Skimmer dart out from beneath the branches of the trees and wheel and turn and glide, now sometimes high in the blue, blue sky, and again just skimming the tops of the grass, on wings which seemed never to tire. But he liked still better the bits of gossip when Skimmer would sit in his doorway and chat about his neighbors of the Old Orchard and his adventures out in the Great World during his long journeys to and from the far-away South. To Johnny Chuck's way of thinking, there was no one quite so trim and neat appearing as Skimmer with his snowy white breast and blue-green back and wings. Two things Johnny always used to wonder at, Skimmer's small bill and short legs. Finally he ventured to ask Skimmer about them. “Gracious, Johnny!” exclaimed Skimmer. “I wouldn't have a big bill for anything. I wouldn't know what to do with it; it would be in the way. You see, I get nearly all my food in the air when I am flying, mosquitoes and flies and all sorts of small insects with wings. I don't have to pick them off trees and bushes or from the ground and so I don't need any more of a bill than I have. It's the same way with my legs. Have you ever seen me walking on the ground?” Johnny thought a moment. “No,” said he, “now you speak of it, I never have.” “And have you ever seen me hopping about in the branches of a tree?” persisted Skimmer. Again Johnny Chuck admitted that he never had. “The only use I have for feet,” continued Skimmer, “is for perching while I rest. I don't need long legs for walking or hopping about, so Mother Nature has made my legs very short. You see I spend most of my time in the air.” “I suppose it's the same with your cousin; Sooty the Chimney Swallow,” said Johnny.