Not a man of them, from the Prime Minister of England down to the junior lieutenant upon the vainly striving fleet of war-vessels, but realized a picture of the doom of the magnificent and costly super-Dreadnought as the pillar of might upon which naval power must rest. Its proud office gone, it appeared to them as little greater than a means of defence against the landing of hostile man power upon Britain's vulnerable shores. The proud queens of the sea must pass from their exalted thrones to a lesser degree in naval armaments. Nor was the realization without pity and regret. How could it be otherwise in the human heart which ever worships the actual display of might? It almost seemed as if the world had been suddenly given over to topsy-turveydom. The facts, however, were irrefutable. As in the dim past the troublous surface of the seas had been conquered by the intrepid and skilful mariner, now at last the devious submarine channels had been turned into an almost equally secure highway of traffic by the inventor. The march of progress was continuing. It was invention triumphant. The world's sea-borne commerce was secured. It was held safe from enemy war-craft in the future. Therefore the doom of the proud battleship had been sounded. Some day, perhaps, a new weapon would be achieved. Some day, perhaps, even the channels of the dark waters would be rendered insecure by the hand that had now made them safe. For the present, however, and probably for years to come, the sea-borne food supplies of Britain stood in no position of jeopardy. It was well past midnight. The house in Smith Square quite suddenly displayed renewed signs of life. A closed motor had driven up, paused, and then passed on. Then appeared many lights behind the small-paned Georgian windows. Ruxton Farlow had returned home with his wife after a strenuous and exciting day; and with them was their devoted Yorkshire father, burning with the sense of a great triumph for his beloved son, and his almost equally beloved daughter. Their journey from Gravesend earlier in the evening had been broken that they might attend an informal dinner-party at Downing Street. It was a function entirely in honor of the masters of Dorby; and it had been arranged that Ruxton's colleagues in the country's Cabinet might tender their sincere congratulations and thanks for the work which he, and his father, and his wife had achieved privately in their country's cause.