They hurried onwards, and after an hour and a half's quick walking, found him standing in front of two formidable looking animals, and barking furiously. The Doctor recognized them at once as belonging to the musk ox, or Ovibos genus, as naturalists call it, by the very wide horns touching each other at their base, by the absence of muzzle, by the narrow square chanfrin resembling that of a sheep, and by the very short tail. Their hair was long and thickly matted, and mixed with fine brown, silky wool. [Illustration: ] These singular-looking quadrupeds were not the least afraid of Duk, though extremely surprised; but at the first glimpse of the hunters they took flight, and it was no easy task to go after them, for half an hour's swift running brought them no nearer, and made the whole party so out of breath, that they were forced to come to a halt. "Confound the beasts!" said Altamont. "Yes, Altamont, I'll make them over to you," replied Clawbonny; "they are true Americans, and they don't appear to have a very favourable idea of their fellow countrymen." [Illustration: ] "That proves our hunting prowess," rejoined Altamont. Meantime the oxen finding themselves no longer pursued, had stopped short. Further pursuit was evidently useless. If they were to be captured at all they must be surrounded, and the plateau which they first happened to have reached, was very favourable for the purpose. Leaving Duk to worry them, they went down by the neighbouring ravines; and got to the one end of the plateau, where Altamont and the Doctor hid themselves behind projecting rocks, while Hatteras went on to the other end, intending to startle the animals by his sudden appearance, and drive them back towards his companions. "I suppose you have no objection this time to bestow a few bullets on these gentry?" said Altamont. "Oh, no, it is 'a fair field now and no favour,'" returned Clawbonny. The oxen had begun to shake themselves impatiently at Duk, trying to kick him off, when Hatteras started up right in front of them, shouting and chasing them back. This was the signal for Altamont and the Doctor to rush forward and fire, but at the sight of two assailants, the terrified animals wheeled round and attacked Hatteras. He met their onset with a firm, steady foot, and fired straight at their heads. But both his balls were powerless, and only served still further to madden the enraged beasts. They rushed upon the unfortunate man like furies, and threw him on the ground in an instant. "He is a dead man!" exclaimed the Doctor, in despairing accents. A tremendous struggle was going on in Altamont's breast at the sight of his prostrate foe, and though his first impulse was to hasten to his help, he stopped short, battling with himself and his prejudices. But his hesitation scarcely lasted half a second, his better self conquered, and exclaiming, "No, it would be cowardly!" he rushed forward with Clawbonny.