When once more he stood upright outside a strange thing had happened. Not only had the tide crept up almost to the cave entrance, but the sun was no longer visible, and as he looked up to the top of the rock wall that environed him, a white pall of fog was slowly settling down and hiding all things. He looked at his watch. He had been on the island over four hours! With sudden fear he started around the way he had come, and when he reached the keg of rum an inspiration almost, made him lift and carry it to a place of safety, well above high-tide mark. Then he retraced his steps to where he had left Obed, but the dory had gone and no one was there, and to add to the situation, the fog had so shut the island in that he could not see two rods over the water. He hallooed again and again, but received no answer. He was alone on Pocket Island with not a morsel to eat, not a blanket to cover him, night coming on, and a fog so thick that he could not see a rod ahead! Even all this did not for one moment obliterate that mysterious keg or cave discovery from his mind, but he felt that he must take steps at once to protect himself from coming night, and darkness, and possible rain, for he knew that when the fog lifted, his friends would return. The first thing was to build himself a shelter, and then a fire. Here his army experience came in well, and he searched until he found two rocks with a level space between, and laying sticks across and cutting spruce boughs to pile over them and others to serve as a bed, he soon made ready a place to at least crawl into when night came. Hunger began to assert itself, but food was out of the question. That keg of rum came to his mind as he worked, however, and when the rude shelter was complete he searched the rocky shores for some large shell, or anything that would hold a small portion of the liquor. He found a cocoanut that the sea had kindly cast up among the rocks, and cutting one end off with his pocket-knife, and digging out the interior, he once more returned where he had left the mysterious keg.