He wondered if he could use this. He stripped away the outer bark from the tree, which before had yielded him a fibre for his hat, and pulled off the long, smooth pieces of the inner bark. He twisted them together. Then he thought how he could weave the strands together. He looked at his shirt. A piece was torn off and unravelled. He could see the threads go up and down. He saw that some threads go from left to right (woof), others lengthwise (the warp). From his study of the woven cloth, Robinson saw he must have a firmer thread than the strips of bark gave alone. He separated his bark into long, thin strips. These he twisted into strands or yarn by rolling between his hands, or on a smooth surface. As he twisted it he wound it on a stick. It was slow, hard work. Of all his work, the making of yarn or thread gave him the most trouble. He learned to twist it by knotting the thread around the spindle or bobbin on which he wound it and twirling this in the air. He remembered sadly the old spinning wheel we had seen at his grandmother's house. His next care was something to hold the threads while he wove them in and out. He had never seen a loom. After long study Robinson set two posts in the ground and these he bound with seventy-two strands horizontally under each other. Then he tied in the top at the left another thread and wove it in and out through the seventy-two threads. So he tied seventy-two vertical strands and wove them in and out. Thus he had a net three times as long as his foot and as wide as long. He tied the four corners together. He made a woven handle for it and put it on his shoulder like a sack, saying gleefully, "This shall be my hunting bag." [Illustration: ROBINSON'S LOOM] XIII ROBINSON EXPLORES THE ISLAND After Robinson made his hunting bag he was anxious to set off on his journey of exploring the island. So he arose very early next morning. "Before it is hot," thought he, "I will be quite a distance on my journey." He ate a couple of bananas, scooped up a few handfuls of water from the spring, stuck a few ears of corn in his hunting bag, took his stick in his hand and went forth. As he left his cave the thought struck him: "What if I could not find my cave again? How can I manage so that I can come back to it? I will go away in one direction and return the same way; but suppose I were to lose the way?" Then he noticed his shadow pointing like a great finger from the sea