They drove and drove for what seemed to Roger an interminable time, though he could not help wondering at the sudden twists and turns in the road, and several times, by the scraping of the underbrush against the body of the rig, he knew they were on no road at all. The undergrowth grew thicker and thicker and the ground more and more boggy, when, after they had been driving for at least two hours and Roger had fallen into a light doze, the horses were pulled up with a jerk. "Here we are," said Field loudly. "Tumble out, boys." The horses had been stopped at the very edge of an immense marsh, that looked almost like a lake in the dim light, but that its margin was fringed with reeds and bulrushes, and although it was so early in the year a scum was beginning to form. The place was not at all inviting, and Roger felt well satisfied that he was not there alone. "Now, son," said Field, lighting a large lantern which was part of the camp outfit, "you stay right here and we will drive the horses away a little distance so that the possible noise of their moving about restlessly won't disturb the birds, and then we will circle the slough in both ways and drive the birds to you. You see, they won't rise at night, but keep to the ground, and if we start in opposite directions from the other side of the slough all the birds will come together right where you are. Then, when they find their escape cut off, they'll have to hit the water or else take wing." "But it will be pretty hard to shoot them," protested Roger; "it's almost pitch-dark." "They won't rise until they come into the circle of light shed by the lantern," said Field, "and then, if you're quick, you can get them as they rise. Now, remember, you've got to keep silent, or else, caught between two fires, they will scatter back from the water; we will be silent, too, so as not to scare them too much. Keep still, and don't shoot until the snipe begin to come into the light." With this Field jumped into the rig, and a minute or two later Roger heard him stop the horses and speak loudly about tying them to a tree. A few moments later, he returned with one of the men. "Harry and Jake have gone round to the south of the slough," he said, "and we will take the other side. Now remember, not a move until the birds begin to come. Good sport to you," and they were gone.