Now Willie brought into play that mental gift he had used to such good effect in the hunt for the German dynamiters at Elk City. His comrades of the Wireless Patrol always said that Willie had a mental photograph in his head of anything he had ever looked at. He did, too. Perhaps everybody has. But Willie was able to visualize a scene as few people are able. He could see not only the broad outlines of a remembered picture, but also the minute details. And that ability, originally native, had been developed to a wonderful degree by practice. Lacking size, Willie had taken the only possible means of putting himself on a par with his fellows. He had developed his wits. So now, startled through his subconsciousness, he sat bolt upright and began to concentrate on the problem before him. Something had suddenly disappeared from the picture. What was it? He drove his memory over the back track, and presently he saw the old tramp wandering about. And he was able to remember even the very spot where he had last seen the tramp. Willie gave a sigh of relief when he made this discovery, for he was troubled lest the old fellow might have tumbled overboard. He was certain he had last seen the man just beside a big pile of boxes near the centre of the pier. For a moment Willie dismissed the matter from his mind. Then into his head popped the question: “Why did that tramp disappear so suddenly?” Again Willie was afire with a problem. He turned the matter over in a hundred ways, and at length decided that the tramp had crawled into the pile of boxes, even as he, Willie, had snuggled down among the lumber, for rest. Likely the old fellow had found a snug berth to catch a little sleep. More than likely there were tarpaulins there, and the fellow had crawled into a bunch of them. They would both keep him warm and make a fairly soft place to rest. Yes, that was undoubtedly the reason. Willie was satisfied that he had solved the problem. He had no doubt that if he nosed about the pile of boxes, he would find the old fellow snug inside. But that was the last thing Willie thought of doing. Even a tramp had a right to sleep.