In performing this pleasant task,--for it has been really a task fit for hot weather, and one of the most agreeable, of a literary kind, which he ever undertook,--the author has not always thought it necessary to write downward, in order to meet the comprehension of children. He has generally suffered the theme to soar, whenever such was its tendency, and when he himself was buoyant enough to follow without an effort. Children possess an unestimated sensibility to whatever is deep or high, in imagination or feeling, so long as it is simple likewise. It is only the artificial and the complex that bewilder them.