Very slowly they drew themselves along. Frank looked on with the greatest attention and interest, and presently saw them halt, while Abe proceeded alone. He lifted up his head slightly, and immediately laid it down again, while the other three crawled up close to him. There was a moment's pause, then the guns were thrust forward, and each slightly raised himself. A moment later the four rifles flashed, and the men sprang to their feet and disappeared over the brow. Frank rode forward at full speed to the spot, and arrived there just in time to see a number of deer dashing at full speed far across the plain, while the four hunters were gathered round three dead stags in the hollow. The hunters' shots had all told; but two had fired at the same animal, the bullet-holes being close to each other behind the shoulder. "Dick was right, you see," Abe said. "It was lucky he caught sight of that horn, for we might not have come upon another herd to-day. Now we will make our way on to the camping-ground; we can go easy, for we shall be there long before the teams." Their horses were brought up, and the deer placed upon them. The hunters then mounted, and took their way in the direction of the spot where the caravans would encamp for the night. "I understand how you find your way now, because the sun is up," Frank said, "but I cannot understand how you would do it on a cloudy day, across a flat country like this, without landmarks." "It's easier to do than it is to explain it," Abe said. "In the first place there's the wind; it most always blows here, and one only has to keep that in a certain quarter. If there ain't no wind, there's the grass and the bushes; if you look at these bushes you will see that they most all turn a little from the direction in which the wind generally blows, and this grass, which is in seed, droops over the same way. Then, in course, there is the general direction of the valleys, and of any little streams. All of these are things one goes by at first, but it gets to come natural, what they call by instinct; one knows, somehow, which is the way to go without looking for signs. You will get to it in time, if you are long enough on the plains; but at present you watch the forms of all the bushes and the lay of the grass, 'cause you see in hunting we might get separated, and you might miss your way. If you should do so, and ain't sure of your direction, fire your gun three times, as quick as you can load it, and if we are in hearing we will fire a gun in reply and come to you; but you will soon get to know the signs of the country if you will pay attention and keep your eyes skinned."