"We'll do that," said Joe; "and that means that I turn off now before we've gone very far, and take in these lower hills."

After they had ridden a mile farther, Joe turned to the north or northwest, while Jack and Vicente kept on until the Mexican pointed out a place where he said Jack had better start north by himself, while he went farther on.

Jack sat for a moment watching the little horse swinging easily along up the hill under the erect military figure; and then, turning to his left, he started to gallop over the ridges and ravines that cut the slopes. It was killing work for a horse, up and down, up and down, up and down. As much as he could, Jack tried to save his animal by taking the hills at an angle, but even at best it was such hard work that Jack felt obliged often to stop, to let the horse rest and breathe.

For some time he rode on without seeing any cattle, but presently in a narrow valley, where evidently water had stood late into the spring, he saw ten or a dozen cows and young stock feeding on a little flat from which they had nipped off all the tall grass, so that at a distance the green carpet looked as if it had been gone over by a lawn-mower.

The cattle saw him almost as soon as he saw them, and seemed wilder than any he had previously come across. In a moment their heads were down, and their tails up and they were bolting across the ridges at a lively gait. Their direction was just that which Jack was taking, or perhaps they bore off a little to the left, which would bring them down more toward Joe's line. At all events, there was no reason to hurry after them, for they would certainly be gathered by one of the three men.

As Jack looked up toward the hill he could occasionally see Vicente crossing an open space, going at a good rate and apparently thinking nothing of his horse. Yet, oddly enough—and Jack as well as others of the round-up boys had often wondered at it—Vicente's horses, even though he had a string of only six and seemed to work them twice as hard as any other horses on the round-up, were always in good spirits, fat and springy. Now and then on the hillside above, and always in advance of Vicente, he could see little bunches of cattle hurrying along. He kept a sharp lookout to his right, thinking that possibly some of those being driven by the Mexican might turn off and drift down the hill in his direction, and if they did so he did not wish to go so far, or so carelessly, as to leave them behind.

Keeping his eye out warily, both up and down the hill, he presently saw above him, rushing diagonally to the front, five black-tail deer, none of them with horns—apparently an old doe, two yearlings and two spotted fawns. They had been startled either by Vicente or by the cattle he was driving, and now were making great time down the hill and toward safety. Even for them the work of crossing these ridges was tiring, and before long Jack could see that the old doe's tongue was hanging out of her mouth and that she was beginning to lose her wind. Jack had no cattle immediately in front of him, and he was riding down into a rather wide valley with a flat bottom. As the deer were drawing near, and would apparently cross in front of him, he put his horse into a fast gallop in order to reach the top of the next ridge about the time the deer got there. This he succeeded in doing, and as he rode up on top of the ridge and drew rein just below some scrubby pine trees, he could see the deer coming at a gallop along the top of this ridge, apparently intending to follow it down to the lower country, instead of continuing their way across the ravines. Jack was partly hidden by the trees, and was making no movement. The deer kept on along the ridge, slackening their pace as they got near to him, until just before they reached the pine trees the two leading does were trotting, the two fawns had almost stopped and the old doe was coming along heavily in the rear. By the pines they all stopped and looked back up the hill, as if to try to learn what had become of the cause of their alarm. They were so close to Jack that he could readily have thrown a rope over the head of any one of them. Their red flanks were heaving and the old doe was quite tired. The little fawns, which could not have been more than six weeks or two months old, were the embodiment of grace and lightness.

After looking back for a moment or two, the deer seemed to feel that there was nothing more to fear from the enemy that had frightened them up the hill. Two or three times they looked at Jack, but neither he nor his horse moved, and after a stare or two the deer looked unconcernedly away. Presently, with a slow, almost slouching, gait, they started to walk on down the ridge toward some underbrush on the hillside; and in doing this they crossed the wind which was blowing from the southeast, and so, in their changed position, blew from Jack to them. As each deer walked into this tainted current it bounded into the air as if shot up by a gigantic spring, and coming down again, the headlong flight was resumed with every appearance of terror. It was not the first time that Jack had seen something of this sort, and Hugh had more than once spoken to him of the effect of the scent of man on wild animals; but to-day Jack wondered at it as much as he had ever done before. The deer had looked squarely at him without recognizing him as anything dangerous or hostile, but the instant that their noses told them that he was there, they raced off in headlong flight.

A few more ridges surmounted, and Jack came again upon the little bunch of cattle that he had started in the morning. Though still wild, they did not rush off in the same alarm that they had shown earlier in the day. Above them on the hillside and near the head of the same ravine were other cattle lying on the steep side hill, and Jack, riding up, started them on their way. These animals had evidently just lain down after feeding, and were not at all wild. It seemed probable to Jack that he might have to do some literal cow punching with these logy beasts, and he took them down the hill with him and started them forward about in the line that he was riding.