After awhile Ruxton broke the silence.
"In your original communication to us you assured us of a means of avoiding the losses we endured during the war from submarine attack. This I understand is the—means. Will you point its uses? I see it in my own way, but I should like to hear another mind on the subject."
Mr. Smith folded his arms and settled himself in his chair. Ruxton was not seeking information on the subject of the boat. His imagination told him all he wanted to know in that direction. It was the man he wanted to study. It was the man he was not certain of. He was convinced that this man was a foreigner, for all his British name. He desired to fathom the purpose lying behind this stranger's actions.
"A great Admiral just before the war," said the inventor, "declared that the future of naval warfare lay under the water, and not on the surface, as we have always believed. He was right. But he did not go as far as he might have gone. The whole future of shipping lies as much under water as on the surface. I tell you, gentlemen, that this boat, here, will afford untold blessings to humanity. To an island country it affords—existence. Think. This country, Britain, is not self-supporting. Is it not so? It could not keep its people alive for more than months. It depends upon supplies from all ends of the earth. All roads upon the high seas lead to Britain. And every helpless surface vessel, carrying life to the island people at home, is a target for the long-distance submarine. If an enemy possesses a great fleet of submarines he does not need to declare a war area about these shores. Every high sea is a war area where he can ply his wanton trade. With the submarine as perfect as it is to-day, Britain, great as she is in naval armaments, can never face another war successfully. That thought is in the mind of all men already." The man paused deliberately. Then with a curious foreign gesture of the hands he went on. "But there is already established an axiom. Submarine cannot fight submarine—under the surface." He shrugged. "It is so simple. How can an enemy attack my submersible? The moment a submarine appears, the submersible submerges and the enemy is helpless. An aerial warship will become a spectacle for the amused curiosity to the ocean traveller. In peace time storms will have small enough terror, and on the calm summer seas we shall speed along at ever-increasing mileage. I tell you, gentlemen, the days of wholly surface boats are gone. The days of clumsy blockades are over, just as are the starvation purposes of contraband of war. With the submersible how is it possible to prevent imports to a country which possesses a seaboard? That is the proposition I put to the world in support of my submersible."
Father and son sat silently listening to the easy, brief manner of the man's explanation. Nor was it till he spoke of the futility of a war submarine's efforts against his submersible did any note of passion and triumph find its way into the man's manner. At that point, however, a definite uplifting made itself apparent. His triumph was in the new depth vibrating in his musical voice. There was a light in his eyes such as is to be found in the triumphant gaze of the victor.
Ruxton beheld these things with greater understanding than his father. Moreover, he interpreted them with that sympathetic understanding of one who possesses great ideals of his own. Whoever this man might be, wherever he came from, one thing was beyond all question in his mind. Here was no mere huckster seeking to trade his wares for the sole purpose of gain. Gain might be his object, but somehow he felt that it was not wholly so, not even paramount in his consideration. It seemed to him that the man had spoken the truth when he had said that his efforts were directed in the service of humanity.
But for all his understanding he had no intention of accepting his own reading without proof from the only direction in which proof could come.
"And what is the commercial aspect of the matter—between us?" he enquired in his most businesslike tone.
Mr. Smith looked up in a startled way from the deep reverie into which his own words had plunged him.
"Commercial?" he echoed a little helplessly.