The vessel now reached the first stake-boat once more, and turning, again started over the course at half-speed, for the tedious process of standardising the screw; that is, determining how many revolutions went to a given rate of speed. The engineers were busy with their calculations. Larkin joined the hungry crowd in the cabin, giving a last look at the blue sea, the misty shore line, and the dim bulk of Agamenticus reared against the western sky. When the _Retvizan_ passed Cape Ann, on her homeward trip, the great lamps on Thatcher's Island were alight, and the waves sparkled in the glow. It was nearly nine o'clock that evening when the chains rattled through the hawse-holes, in the lower harbour, as the battleship came to anchor. Many had been the guesses as to her speed. Had she come up to her builders' expectations? Had she passed the test successfully? These were the questions that flew to and fro among the passengers, crowding about the gangway beneath which the tug was soon rising and falling. At the last moment the approximate result of the engineers' calculations was given out. The ship had responded nobly to the demand upon her mighty machinery. Splendidly built throughout, perfectly equipped for manslaughter and for the protection of her crew, obedient to the lightest touch of the master-hand that should guide her over the seas in warfare or in peace, the _Retvizan_ had shown herself to be one of the swiftest and most powerful war-ships in the world. For twenty miles, in the open ocean, she had easily made a little over eighteen knots an hour. In the confusion of going on board the tug and disembarking in the darkness, no one observed the two Japanese waiters, who must have forgotten even to ask for their wages. Certain it is that Oto and Oshima were among the very first to land on the Boston wharf, and to disappear in one of the gloomy cross-streets that branch off from Atlantic Avenue. CHAPTER II. "MAN OVERBOARD!" "Well, we're out of the harbour safely, Captain," said Executive Officer Staples with a sigh of relief, as he spread out the chart of the Massachusetts coast and glanced at the "tell-tale" compass. "No more trouble till we get down by the Pollock Rip Shoals." "Anybody would think you had been taking a battleship out from under the enemy's guns," laughed Lieutenant-Commander David Rexdale. "Don't talk about 'trouble,' Tel., while it's daylight, off a home port, in good weather!"