On came the old dog, and was very soon jumping up and licking our hands and faces, and wagging his tail, till it looked as if he would wag it off.  He seemed in no way displeased at receiving a piece of beef; and as soon as he had got it he began to trot off with it in his mouth in the direction from which he had come.  After going a few yards, however, he stopped and turned half round, and wagged his tail, as much as to say, "Come along with me; I trotted all the way on purpose to fetch you."