Simultaneously the two men whose lives had been hitherto given up to ship construction rose to their feet, and pored over the wonderful and delicate mechanism and design the interior revealed.
Then it was that Sir Andrew verbally broke the silence.
"Will you explain, Mr. Smith?"
The inventor removed his cigar.
"You know – marine mechanism?" he enquired.
Sir Andrew nodded.
"Yes, unless there is a new principle here."
"It is the perfected submarine principle which was used towards the end of the war. There is no fresh detail in that direction."
"We have a complete knowledge of that principle," said Ruxton. "We have been constructing for the Admiralty throughout the war."
"Good."
There was a distinct "T" at the end of the word as Mr. Smith spoke it.
Ruxton shot a quick glance in his direction. The man's whole personality was an unusual one. He was very tall, and very thin. His intellectual head, quite nobly formed, was crowned by a shock of snow-white hair closely hogged, as might be a horse's mane. His features were almost as lean as his body. But the conformation of a magnificent forehead and the gently luminous eyes, beneath eyebrows almost as bushy as a well-grown moustache, made one forget the fact. Then, too, the carefully groomed, closely cut snow-white beard and moustache helped to disguise it still more. It was the face of a man of great mentality and lofty emotions, a face of simplicity and kindliness. It was, in fact, a face which demanded a second scrutiny, and one which inspired trust and liking.
To the rest must be added certain details which seemed a trifle extraordinary in view of his profession. If his tailor did not trade in Bond Street then he certainly must have served his apprenticeship in those select purlieus. Perfect cut and excellence of material marked every detail of his costume, which was of the "morning" order.
"Then there is little enough to explain, except for the architectural side of the matter," Mr. Smith went on, with a peculiarly back-of-the-throat tone in his speech, which also possessed a shadow of foreign accent. "I am not offering you a submarine principle. That is established now all over the world. I please to call my invention a submersible merchantman. You will observe the holds for merchandise. You will see the engine-rooms," he went on, rising and pointing out each detail as he enumerated it. "There are the stateroom decks, with the accompaniment of saloon and kitchens, and baths, and – and all the necessities of passenger traffic. Everything is there on a lesser scale such as you will find on a surface liner. Its speed and engine power will compare favorably with any liner afloat up to ten thousand tons. Thus it has the speed of a surface craft on the surface, with the added advantages of a submarine. In addition to these I have a light, in the course of production, which will serve to render the submarine immune from the dangers of submersion. I call it the 'U-rays.'"
"The U-rays?" Ruxton's enquiry came like a shot.
"Just so."
Mr. Smith replied quite unhesitatingly, and Ruxton's obvious suspicion was disarmed.
"This vessel," the inventor went on, quite undisturbed, "solves the last problem of sea traffic under – all conditions."
The light of enthusiasm was shining in the man's luminous eyes as he made his final pronouncement. It was as though the thought had filled him with a profound hope of the fulfillment of some ardent desire. It suggested to the more imaginative Ruxton that he cared more for the purpose of his invention than for its commercial aspect to himself.
"You speak, of course, of – war," Ruxton said.
The large eyes of the stranger widened with horror and passion.
"I speak of – international murder!" he cried fiercely.
Sir Andrew turned from the model at the tone of the reply. Ruxton would have pursued the subject, but Mr. Smith gave him no opportunity.
"Your pardon, gentlemen," he said with a sudden, exquisite smile of childlike simplicity. "Memories are painful. I have much that I remember, and – but let us keep to the business in hand."
"Memories are painful to us all – here in England," said Ruxton gently. "But – this is a beautiful model. Perfect in every detail."
"It was made in my own shops," returned the inventor simply.
"And you say this," indicating the model, "has been tested on a constructed vessel?"
"I have travelled more than ten thousand miles in just such a vessel. I have travelled on the surface at twenty-four knots, and under the surface at fifteen. I have carried mixed cargoes, and I have carried certain passengers. All these things I have done for experiment, so that the principle should be perfected. You can judge for yourselves. A vessel of this type awaits your pleasure at any hour. A vessel of two thousand tons."
"Two thousand?" The incredulous ejaculation escaped Sir Andrew before he was aware of it.
"It is nothing," exclaimed Mr. Smith, turning quickly. "A vessel of ten thousand tons can just as easily be constructed."
The sweeping assertion spoken with so simple a confidence had the effect of silence upon his audience. It was overwhelming even to these men who had witnessed the extraordinary development of invention during the war.
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