For the next few minutes it was a wild struggle for life. They found at once that they were powerless to swim in the broken water, which, as it rushed across the sand, impelled alike by the rising tide behind it and the force of the wind, hurried them along at a rapid pace, breaking in short steep waves. They could only cling to the mast and snatch a breath of air from time to time as it rolled over and over. Had they not been able to swim they would very speedily have been drowned; but, accustomed as they were to diving, they kept their presence of mind, holding their breath when under water and breathing whenever they were above it with their faces to the land. It was only so that they could breathe, for the air was thick with spray, which was swept along with such force by the wind that it would have drowned the best swimmer who tried to face it as speedily as if he had been under water. After what seemed to them an age the waves became somewhat less violent, though still breaking in a mass of foam. Geoffrey loosed his hold of the spar and tried to get to his feet. He was knocked down several times before he succeeded, but when he did so found that the water was little more than two feet deep, although the waves rose to his shoulders. The soft mud under his feet rendered it extremely difficult to stand, and the rope which attached him to the spar, which was driving before him, added to the difficulty. He could not overtake the mast, and threw himself down again and swam to it. "Get up, Lionel!" he shouted; "we can stand here." But Lionel was too exhausted to be capable of making the effort. With the greatest difficulty Geoffrey raised him to his feet and supported him with his back to the wind. "Get your breath again!" he shouted. "We are over the worse now and shall soon be in calmer water. Get your feet well out in front of you, if you can, and dig your heels into the mud, then you will act as a buttress to me and help me to keep my feet." It was two or three minutes before Lionel was able to speak. Even during this short time they had been carried some distance forward, for the ground on which they stood seemed to be moving, and the force of the waves carried them constantly forward. "Feel better, old fellow?" Geoffrey asked, as he felt Lionel making an effort to resist the pressure of the water. "Yes, I am better now," Lionel said. "Well, we will go on as we are as long as we can; let us just try to keep our feet and give way to the sea as it takes us along. The quicker we go the sooner we shall be in shallower water; but the tide is rising fast, and unless we go on it will speedily be as bad here as it was where we started."