Making his way to the chartroom the Third Officer "laid off" the position of the mines. His rough guess proved to be remarkably accurate. According to the position given, the source of danger was only a few miles from the Outer Dowsing Lightship, and the _West Barbican_ had to pass close to the Outer Dowsing on her course to Brocklington. Anstey's next step was to inform the Captain. The Old Man, a sailor to the backbone, was in the chart-house in a trice, where, after a brief but careful survey of tide-tables and current-drift charts, he was able to determine the approximate position of the floating mines when the ship would be in the immediate vicinity of the light-vessel. Allowing for the set and strength of the tide and the drift caused by the wind, between the time the mines were first sighted and the time when the _West Barbican_ entered the danger-zone, he was able to assert that, if the ship's original course were maintained, she would pass at least ten miles to the east'ard of those most undesirable derelicts. "I think we're O.K., Mr. Anstey," he remarked. "Besides, for all we know the mines might have been exploded by this time. Those naval Johnnies are pretty smart at that sort of thing. Well, carry on. Let me know if there are any supplementary warnings." The Old Man returned to his cabin, and was soon deep in the pages of a novel; while Anstey resumed his trick, thanking his lucky stars that, unlike Mostyn's, his watch was not indefinitely prolonged through the shortcomings of two sea-sick "birds". Just as darkness set in, the gale was at its height. Clouds of spray flew over the bridge as the old hooker wallowed and nosed her way through the steep, crested waves, for the wind had backed still more and was now dead in her teeth. Even in the wireless-cabin the noise was terrific. The boats in davits were creaking and groaning, as they strained against their gripes with each disconcerting jerk of the ship. Spray in sheets rattled upon the tightly stretched boat-covers like volleys of small shot, while the monotonous clank-clank of the steam steering-gear, as the _secuni_ (native quartermaster) strove to keep the ship within half a degree of her course, added to the turmoil that penetrated the four steel walls of the cabin. Vainly Peter tried to concentrate his thoughts on a book. Yet, in spite of the fact that he was wearing telephones clipped to his ears, the hideous clamour refused to be suppressed. Reading under these conditions was out of the question. He put away the book and remained keeping his weary watch, valiantly combating an almost overwhelming desire for sleep. Suddenly, with a terrific crash, something hit the deck of the flying-bridge immediately above the wireless-cabin. For a moment Peter was under the impression that one of the foremost derricks had carried away and crashed athwart the roof of the cabin.