They had to part them with their arms first, like swimming, and then push through, and the ceaseless resistance wore out their power. Even Bevis at last agreed that it was not possible, they must go back to the path in the sedges on their right. After standing still a minute to recover themselves they turned to the right and went towards the sedges. In about twenty yards Mark, who had been sounding with his spear, touched something that splashed, he stopped and thrust again, there was no mistake, it was water. On going nearer, and feeling for the bottom with the spear, Mark found it was deep too, he could not reach the bottom. The grasses grew right to the edge, and the water itself was so covered with weeds that, had they not prodded the ground before they moved, they would have stepped over the brink into it. The New Sea, receding, had left a long winding pool in a hollow which shut them off from getting to the path in the sedges unless by returning the weary way they had come. “This is dreadful,” said Mark, when they had followed the water a little distance and were certain they could not cross. “We can’t get out and we can’t go back; I am so tired, I can’t push through much longer.” “We must go on,” said Bevis; “somehow or other we must go on.” He too dreaded the idea of returning through the entangled vegetation. It was less dense on the verge of the pool than by the hedge, and by feeling their way with the spear they got on for a while. Thirsty as he was Mark could not drink from the weed-grown water; indeed he could not see the water at all for weeds and green scum, and if he pushed these aside with his spear the surface bubbled with marsh gases. Bevis too persuaded him not to drink it. Slowly they worked on, the marsh on one side, and the hedge on the other. “Look,” said Mark presently. “There’s a willow; can’t we climb up and see round?” “Yes,” said Bevis; and they changed their course to get to it; it was nearer the hedge. They felt the ground rise, it was two yards higher by the willow, and harder; when the sea came up the spot in fact was an islet. There were bushes on it, brambles, and elder in flower; none of these grow in water itself, but flourish on the edge. There were several tall willow-poles. Bevis put down his bow and arrows, took off his jacket (the pockets of which were stuffed full of things), took hold of a pole, and climbed up. Mark did the same with another. The poles were not large enough to bear their weight very high; they got up about six or eight feet. “There’s Sindbad’s Island,” said Mark, pointing to the right. Far away, beyond the sedges and the reeds, there was a broad strip of clear water, and across it the island of Serendib. “If we only had a canoe.” “Perhaps we could make one,” said Bevis. “They make them sometimes of willow--and from oak, only we have nothing to cover the framework; sometimes they weave the rushes so close as to keep out water--”