A boy, whom I knew very well, was once going through a meadow, which was full of buttercups. The nurse and his baby sister were with him; and when they got to an old hawthorn, which grew in the hedge and was covered with blossom, they all sat down in its shade, and the nurse took out three slices of plum-cake, gave one to each of the children, and kept one for herself. While the boy was eating, he observed that this hedge was very high and thick, and that there was a great hollow in the trunk of the old thorn-tree, and he heard a twittering, as if there was a nest somewhere inside; so he...