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?"