The child in the Pullman-car uniform just going ashore is a wireless operator, aged nineteen. He is attached to a flagship at least 120 feet long, under an admiral aged twenty-five, who was, till the other day, third mate of a North Atlantic tramp, but who now leads a squadron of six trawlers to hunt submarines. The principle is simple enough. Its application depends on circumstances and surroundings. One class of German submarines meant for murder off the coasts may use a winding and rabbit-like track between shoals where the choice of water is limited. Their career is rarely long, but, while it lasts, moderately exciting. Others, told off for deep-sea assassinations, are attended to quite quietly and without any excitement at all. Others, again, work the inside of the North Sea, making no distinction between neutrals and Allied ships. These carry guns, and since their work keeps them a good deal on the surface, the Trawler Fleet, as we know, engages them there-the submarine firing, sinking, and rising again in unexpected quarters; the trawler firing, dodging, and trying to ram. The trawlers are strongly built, and can stand a great deal of punishment. Yet again, other German submarines hang about the skirts of fishing-fleets and fire into the brown of them. When the war was young this gave splendidly "frightful" results, but for some reason or other the game is not as popular as it used to be.