In front was the famous trout pond, and beyond the little valley made by the pond the crest of the mountain rose higher and higher. Dusk was coming on, and the crisp mountain air was filled with the shadows of the woods; along the mountain summit lay streamers of white cloud. Down, down, down reached the long fingers of cloud, and up, up, up reached the deep shadows, just as if a great hand were closing the world in dusk. Every little sound was as clear in the evening air as the water of the pond was transparent. Small shadows moved about the edge of the pond--deer, they were, said Ben Gile, that had come down to the edge to drink. "Phew, isn't it cold!" shouted the children, as they ran from one thing to another; "and won't supper taste good!" Jack, who hadn't on any stout boots like Jimmie's, and whose jacket was threadbare and thin, began to think the sleeping-blankets would feel good when it was time to crawl in. In front of the cabin blazed a big camp-fire, and around this fire supper was served. "Did stewed apricots, soda-biscuits, bacon, eggs, hot cakes, ever taste so good? Will they ever taste so good again? Did hot cakes and syrup ever make the butter fly so fast?" asked Ben Gile. "And, speaking of the butterfly," he went on, "it's not time to turn in yet, it's too dark to fish or explore, so let me tell you a little more about the butterfly, and if you don't like it you can just imagine it is a hot-cake butterfly." The children thought this was a great joke. But Peter, who had eaten so much he was almost asleep, didn't hear what Ben Gile said. "Well," the old man continued, just as if he were beginning where he had left off in the afternoon--"well, the caterpillar eats so much--it eats almost as much as Peter does"--at this Peter opened his eyes good-naturedly--"it eats so much that very soon it grows too big for its skin, so the old skin splits for the growing body, and out comes young caterpillar in a clean, new dress--a very easy way for Mrs. Butterfly to have her babies get new clothes. Don't you think it is, Mrs. Reece?--no hems to stitch, no buttons to sew on, no darning. The only things their mothers ever do for them is to start them with the food they like. "And such a butterfly this mother is that little she cares whether her children are considered pests or not, because they eat everything green that they like, and eat before they are invited. A long sigh of relief the gardener or farmer draws when the caterpillars lie quiet to pupate. They lie very, very quiet, with wings, antennae, and legs folded under the body." "What does pupate mean?" asked Betty, who was poking the fire and listening hard to every word the old man spoke. [Illustration: _A._ Cocoon of a polyphemus moth. _B._ Cocoon of a cecropian moth.]