One cold winter day, when Little Mitchell’s lady was crossing the Common early in the morning, and Little Mitchell was not with her, a big gray squirrel ran up to her and asked for a nut. Of course he could not ask in people’s talk, but he asked very plainly in squirrel talk,—in their sign language. He made no sound, but signed for nuts in the prettiest way, running close up to her, flatting out a little toward the ground, and looking up into her face as Little Mitchell looked when he was coaxing for something. The lady had no nuts with her; but she brought some when she came that way again. Then she found somebody else had given him nuts, and he was sitting on the ground eating them. Of course this squirrel did not pass the winter in a nest in the branches of a tree. Oh, no, he had a nice warm hiding-place inside a big tree that had a hole in the crotch so that he could get in. Once there were a great many squirrels on the Common, but one day there were none. They had all gone off. What had become of them? everybody was asking. The policeman knew, for he saw them go. It was very early in the morning, and they went all together, single file, across Cambridge bridge. They were on the bridge railing, one old fellow leading the way. Perhaps there were getting to be too many of them to be comfortable on the Common. Perhaps they were tired of city life. Anyway, the policeman saw them go, and that was the end of the squirrels on the Common for some time. At least, so I was told. A good many city parks have gray squirrels in them, but where else are they so tame as in the park at Richmond, Virginia? Little Mitchell’s lady was there one day, before she had found Little Mitchell, and the squirrels were so tame they came right up and ate out of her hand; and when she stooped down to speak to one, another little fellow raced right up her back,—which rather startled her, because she was not used to squirrels then. Well, Little Mitchell grew fast, and promised to become a very large and handsome squirrel, when he made a dreadful mistake one day and licked the heads of the matches. He got into the match-box somehow,—he was always opening boxes to see what was in them,—and he liked the taste of the matches, never suspecting what sad results would follow. The lady looked about at last to see what he was up to,—for if he was quiet more than a minute at a time it meant mischief. How she jumped when she saw what he was doing! But it was too late, and little Mitchell tumbled over then and there, and the lady thought he was dead; but he was not. He appeared to get over it and be perfectly well again; and the lady—who did not know as much about phosphorus poisoning then as she was soon to learn—thought nothing was to come of it. You see, phosphorus is the stuff on the ends of matches that makes them light; and it is poison,—and a mean, horrible poison too.