Now the branch of the parent Navy with which the Submarine Service has remained most in touch is the department concerned with mines and torpedoes. The headquarters of such craftmanship is properly a shore establishment: but following the custom of the Navy it retains the name of the hulk from which it evolved, and is known in Service circles as H.M.S. _Vernon_. A certain submarine was returning from what (to borrow a phrase from German naval _communiqués_) may be described as an enterprise. It was one which involved a number of hazardous feats, not least of which was navigating submerged in an area from which the enemy had removed all buoys and lights, and was patrolling with destroyers and Teutonic thoroughness. The submarine was proceeding thus at slow speed with her crew at their stations. Their countenances wore expressions similar to those on the faces of the occupants of a railway carriage travelling through a tunnel. One, a red-pated man, tattooed like a Patagonian chieftain, sat with his lips pursed up in a soundless whistle, watching a needle flicker on a dial, while he marked time to an imaginary tune with his foot. A sharp metallic concussion jarred the outer shell of the fore compartment. It was followed a second later by another, farther aft, and then another. Six times that terrible sound jolted the length of the boat, and then all was silence. The noise made by a mine striking a submarine under water is one few have lived to describe, yet every man there interpreted it on the instant. They waited in the uncomfortable knowledge that mines are sometimes fitted with delay-action primers which explode them some seconds after impact. Then suddenly the tension broke. For the first time the red-headed man took his eyes from the dial, and his foot stopped its noiseless tattoo. “Good old _Vernon_!” he said sourly. “Another blasted ‘dud’!” Once clear of their own bases and the sight of war signal stations, the submarine is an outlaw on the high seas, fending for itself in the teeth of friend or foe. True there is an elaborate system of recognition signals in force, but the bluff seamen in command of the armed auxiliaries that guard the seaways round the coast have a way of acting first and talking afterwards. It is the way of the sea. A homing submarine on the surface encountered one of these gale-battered craft, and in spite of vehement signals found herself under a rain of projectiles from the trawler’s gun. Realising that the customary signals were of no avail, the commanding officer of the submarine bethought him of a still more easily interpreted code. The second-in-command dived down the conning-tower, snatched the tablecloth off the breakfast table, and together they waved it in token of abject surrender. The trawler ceased fire and the submarine approached near enough to establish her identity with hand-flags. The white-bearded skipper of the trawler was moved to the depths of his Methody soul.