It made him rather breathless to mount so many stairs, but curiosity and a love of adventure led him on, and presently he found himself within the wonderful chamber he had visited before, only that now the great bright lamp with its myriad wicks and wonderful reflectors was alight, and slowly moving round and round, so that at one time it showed a red eye to those out at sea in great ships, at another a green, and again a pure white light, as white as crystal. The child stood gazing at the wonderful mechanism without speaking a word. He was trying to see how it moved, and by what power the great reflectors moved round and round. Of course he could not understand, and he quickly came to the conclusion that the thing was some great living monster, and that it had to be watched all the night through lest it went to sleep, or refused to do its part properly. He wondered, with a thrill of nervous terror, whether it would resent his intrusion into its special domain. Standing as he did in the full glare of the light, he could not hope to escape observation, and he looked about him as if for a hiding-place in case of attack. And then his eye fell upon the figure of the solitary watcher--a bent bowed figure, in a slouching and indifferent attitude, now quite familiar to the child, although he and the individual who owned that rough exterior had never as yet exchanged a single word. Pat was not a shy child as a rule, but he had always stood in awe of "Surly Jim." He could eat better and chatter more freely when the man was not present at table. He shrank a little into himself always when Jim entered the living room. It was not often that he did this, save when called to meals, for when not on duty, he was either sleeping in his own room, or sitting in the boat smoking a short black pipe, and Pat had never attempted to approach him at these times. Now he was nearer to him than he had ever been, except at table, and yet the man appeared to take no manner of notice of his approach. He sat with his elbows on his knees, and his head in his hands, and did not seem to look up at the child's cautious approach. Pat felt certain he had been seen, but this indifference seemed a little uncanny. He drew near step by step, and at last laid one small cold hand on the knee of the assistant. "Is it alive?" he asked softly, divided in his awe of the wonderful mechanism and its grim watcher. The man slowly lifted his head, and stared at the child without attempting to speak. Pat hesitated a moment, and then climbed upon the bench upon which Jim was seated, and slipped his small thin hand within the horny palm of the man. He felt that he must have hold of something human up here in this strange place of light and movement. He was trembling, and yet he was not exactly afraid.