Trees are all different, as you know, and I am sure some tiresome person must have told you that there are no two blades of grass exactly alike. But in streets, where the blades of grass don't grow, everything is like everything else. This is why many children who live in the towns are so extremely naughty. They do not know what is the matter with them, and no more do their fathers and mothers, aunts, uncles, cousins, tutors, governesses, and nurses; but I know. And so do you, now. Children in the country are naughty sometimes, too, but that is for quite different reasons.