Marco made the discovery that the boat was gone, just after finishing his dinner, and he immediately gave the alarm. Forester and the boatman came at once to the spot. They could just see the boat, half a mile distant, under a ledge of rocks, which formed the shore in that place.
This was the third time, on this journey, that Marco had found himself isolated in circumstances of difficulty and danger, and cut off, apparently, from all convenient means of retreat; and, at first, he thought that this was the worst and the most dangerous of the three. In fact, he did not see in what possible way they could escape.
"What shall we do?" asked Forester.
"We must make a raft, somehow or other," said the boatman. "If I had a log, I could go after the boat on that."
"Won't this tree answer for a log?" asked Marco.
The boatman looked at the tree. He said that, if he had an axe, he thought he could cut off the top, and roll the trunk into the water; but it would take him a long time, he said, to hack it off with the hatchet.
There seemed to be, however, no alternative; so he set himself at work, and in due time he cut off the stem of the tree, just where it entered the water. They all three then took levers, which the boatman made with his hatchet, and, by making great exertion, they got the log out of the sand, and rolled it round into the water, where it floated. The man then cut a long pole, and, mounting upon the log, he pushed himself out over the surface of the water.
Forester and Marco watched his progress with great interest. Marco thought that he would certainly roll off the log, but he seemed to stand and to walk upon it, perfectly at his ease. He would advance to the forward end of the log, and then, planting the foot of his pole in the sand on the bottom, he would push, walking along as the log advanced, until he came to the stern end of the log, when he would draw out his pole, and walk back again. In this way he propelled the log until the water became too deep for his pole to reach the bottom, and then he ceased these efforts, and, standing upright, he left himself to be driven along slowly by the wind.
Forester and Marco saw plainly that he would be gone for some time, and they amused themselves, during his absence, in wandering about the shores of the island. In one place, Marco found, upon a rock a little above the water, a slab of pine wood, which was bleached by the sun and rain. It had drifted down, the summer before, from some stream emptying into the pond. In the winter it had been frozen into the ice, and, when the ice broke up on the following spring, the cake to which the slab was attached, had been crowded up upon the shore, where the slab had been left when the ice melted.