made for his purpose. They were thick and leathery and tapered from base to apex like a triangle. He now proceeded with his hat-making. He would take a leaf and lay it on the ground with the base toward him. Then he laid the hoop on the base of the leaf, wrapped it around the hoop and fastened it with thorns. He did the same with the other leaves. The thorns were his pins. At last he pinned the tips of the leaves together at the top and the hat was ready. It looked just like a big cone, but it kept out the heat of the sun. Robinson now had corn and bananas and when he was thirsty he drank a handful of water from the spring. He had been now nine days on the island. Every day he looked out on the sea until his eyes ached to see if he might discover a ship. He could not understand why no ship came his way. "Who knows how long I must wait here?" said he sorrowfully. Then the thought came to him: "You will not be able to keep track of the days unless you write it down." XI ROBINSON'S CALENDAR The matter of keeping track of time puzzled Robinson very much. It was getting more difficult every day to keep it in his memory. He must write down the days as they slip by, but where and how? He had neither pen, ink, nor paper. Should he mark every day with a colored stone on the smooth side of the huge rock wall within whose clefts he had dug out his cave? But the rain would wash off the record and then he would lose all his bearings. Then he thought of the beach, but there the wind and waves would soon also erase it. He thought a long time. "I must find something," he said to himself on which to keep a record. "I must also know when Sunday is. I must rest one day in the week. Yes, I must find something," he said, "on which to write." And finally he found it. He chose two trees standing near each other and then sought for a small sharp stone, which he could make still sharper by striking it on another. When he had got this pen ready he cut into the bark of one tree: _Shipwreck, Sunday, 10th of September, 1875._ He made seven cuts in a row for the seven days in the week. The first cut was longer than the others. This was to represent the Sunday. At sundown every day he made a new cut in the bark.