They looked an orderly little squadron of six as they steamed jauntily out towards the open sea in single line ahead through the grey-green, tide-ripped waters of the most thickly populated river estuary in the world. They were prosaic, snub-nosed-looking little craft, short and squat, with high, upstanding bows, prominent wheelhouses, and stumpy mizzen-masts abaft all. They hailed from many ports and still bore the letters and numbers of their peace-time vocation: F.D. for Fleetwood, G.Y. for Grimsby, B.F. for Banff, and P.D. for Peterhead. They were steam herring drifters in the ordinary, common, or garden, piping times of peace; little vessels which went to sea for days on end to pitch, wallow, and roll at the end of a mile or a mile and a half of buoyed drift-net, in the meshes of which unwary herring, in endeavouring to force a way through, presently found themselves caught by the gills. But now, each one of them flew the tattered, smoke-stained apology for a once White Ensign, and they were men-of-war, very much men-of-war. They had been at the game for nearly twenty-four months, and, through long practice, they elbowed their way in and out of the traffic with all the fussy, devil-may-care assertiveness of His Majesty's destroyers. Their admiral, a Royal Naval Reserve lieutenant, who, in peaceful 1914, was still the immaculate third officer of a crack Western Ocean passenger liner, looked out of his wheelhouse windows and surveyed the potbellied, lumbering cargo carriers steaming by with all the kindly tolerance of the regular man-of-war's man. He, though he did not look it, for they had been coaling an hour before and he was still grimy about the face, was the only commissioned officer in the squadron, fleet, flotilla, or whatever you like to call it. All the other craft were commanded by skippers, ex-peacetime-captains of the fishing craft, who were used to the sea and its vicissitudes, and knew the ins and cuts of their vessels far better than they could tell you. The men, for the greater part, were also fishermen enrolled in the Reserve, with here and there an ex-naval rating in the shape of a seaman gunner or signalman.