Paddy The Beaver in "Paddy The Beaver Begins Work"

So now that he was ready to begin his dam he went up the Laughing Brook to a place where alders and willows grew, and there he began work; that work was the cutting of a great number of trees by means of his big front teeth which were given him for just this purpose. And as he worked, Paddy was happy, for one can never be truly happy who does no work.