then, one may definitely assert, you have in you much that goes to the making of an ideal Q-ship captain and a brave warrior. As such you might make a first-class commanding officer of a destroyer, a light cruiser, or even a battleship; but something more is required. The enemy is artful; you must be super-artful. You must be able to look across the tumbling sea into his mind behind the conning tower. What are his intentions? What will be his next move? Take in by a quick mental calculation the conditions of wind, wave, and sun. Pretend to run away from him, so that you get these just right. Put your ship head on to sea, so that the enemy with his sparse freeboard is being badly washed down and his guns’ crews are thinking more of their wet feet and legs than of accurate shooting. Then, when you see him submerging, alter course quickly, reckon his probable position by the time you have steadied your ship on her course, and drop a series of depth-charges over his track. ‘If you can fill the unforgiving minute with sixty seconds’ worth of distance, run’; if you have acted with true seamanship and sound imagination, you will presently see bits of broken wreckage, the boil of water, quantities of oil, perhaps a couple of corpses; and yours is the U-boat below, my son, and a D.S.O.; and a thousand pounds in cash to be divided amongst the crew; and you’re a man, my son! That, in a few phrases, is the kind of work, and shows the circumstances of the Q-ship in her busiest period. As we set forth her wonderful story, so gallant, so sad, so victorious, and yet so nerve-trying, we shall see all manner of types engaged in this great adventure; but we cannot appreciate either the successes or losses until we have seen the birth and growth of the Q-ship idea. As this volume is the first effort to present the subject historically, we shall begin at the beginning by showing the causes which created the Q-ship. We shall see the consecutive stages of development and improvement, the evolution of new methods, and, indeed we may at once say it, of a new type of super-seamen. How did it all begin? [Illustration: AN EARLY Q-SHIP Q-ship “Antwerp” entering Harwich harbour.] [Illustration: Q-SHIP “ANTWERP” Commander Herbert is on the port side of the bridge, the Mercantile Chief Officer and Quartermaster being in the foreground. To face p. 6]