All this Bob did because he supposed that he was riding ahead of his friends, and that they were following him, and admiring him. He had not made any calculation as to the great rate of speed at which his donkey was carrying him, and had no idea how quickly he was leaving all the rest behind. So, while he had been indulging in his pranks for the amusement of those whom he supposed to be following him, he was, in reality, already beyond the reach of their eyes. For his donkey was an animal very far superior to the common herd. He was not a donkey--he was an ass--spirited, slender, sinewy, and fleet as a race-horse. There was something so peculiarly easy in the ass's gait that it deceived the rider. It seemed to him to be a gentle ambling trot, or something midway between that and a canter. In reality this easy pace was exceedingly swift, and before long Bob was out of sight of his friends. This discovery burst upon him as he turned, with the intention of shouting back some nonsense to them, when, to his utter amazement and consternation, he saw no signs of them whatever. It must be confessed that the shock which this discovery gave to Bob was a very powerful one. He looked all around in anxious curiosity, with the endeavor to comprehend his situation. His first thought was, that some accident had happened to the party which was delaying them; but soon he became aware of his own tremendous progress, and understood the true state of the case'. He was now in a place where the road ran straight for over a mile. At the end of this it turned. As Bob reached this turning-place, he looked back again, and far away, just at the entrance upon the straight piece of road, he saw the party coming. A few seconds and he was once more carried out of sight. And now Bob began to feel that his situation was a serious one. It was not pleasant to be carried away in this manner, in a strange country, on the back of an animal like this. Had it been a runaway horse, he would have felt less troubled. He would, in fact, have felt quite at home, for he had been frequently run away with on horseback. He understood horses, but of asses he knew nothing. A horse was to some extent a sensible animal. He would run away, and in due time would come to a pause. But an ass! Was an ass possessed of any sense of decency--any conscience? Would the well-known obstinacy of the ass be shown on an occasion like this? and would this ass, merely out of that obstinacy, keep on running for all the rest of the day? It was a startling thought.