Another, and another, and yet another watchful Presence loomed up out of the night, hailed suspiciously, and, at the megaphone’s answering bellow, merged again into the silent darkness. A figure stepped aft in the Guard Boat and adjusted the tarpaulin that covered the rifles lying on top of the cabin: moisture had collected among the folds in little pools. Then the engine-room gong rang, and a voice quite near hailed them. A long black shadow appeared abreast, and the Guard Boat slid alongside a Destroyer at anchor. The dark water between the two hulls churned into foam as the boat reversed her engines. A tall figure holding a lantern leaned over the Destroyer’s rail. "Night Guard," said the Lieutenant curtly. As he came forward, three men climbed silently up from below and stood awaiting orders at his side. The lantern shone unsteadily on their impassive faces. "Are you the Quartermaster?" "Yessir." The tall man in oilskins leaning over the Destroyer’s rail lowered his lantern. "All right, I won’t come inboard. All correct?" "All correct, sir." "Right. Put it in the log that I’ve visited you. Good-night." "Good-night, sir." The gong clanged, and the Guard Boat slid away into the mist again. The figure in the bows was relieved by a comrade, and together with the remaining two vanished down the foremost hatch. The faint reek of Navy tobacco drifted aft to the stern-sheets, where the Lieutenant of the Night Guard had resumed his position, leaning against an angle of the cabin with his hands deep in the pockets of his overcoat. He was reflecting on the strangeness of a profession that dragged a man from his bed at one o’clock in the morning, to steam round a foggy harbour in the company of armed men, these times of piping peace. Once a night throughout the year, in every Dockyard Port in the kingdom, a launch slid away from the Depot jetty, slipped in and out among the anchored ships, and returned to her moorings when the patrol was completed. Why? Some grim significance surely lay in the duty, in the abrupt hails that stabbed the stillness, greeting the throb of her engines: in the figure of the armed man in the bows with the megaphone, ready to fling back the reassuring answer.... He shifted his position and glanced forward. The bowman was chewing tobacco, and every now and again turned his head to spit overside. Each time he did so the port bow-light lit his features with a ruddy glare. It was a stolid countenance, slightly bored.