"M. De Beauxchamps," he responded, grasping his friend warmly by the hand, "I thank you from the bottom of my heart for your amiable intention, and I assure you that nothing could afford me greater satisfaction than to see once more that mighty city, even though it can now be but an awful ruin, tenanted by no life except the terrible creatures of the deep. But, while I foresee what your plan must be, I can hardly conceive that its execution could be possible. You are thinking, of course, of constructing a diving apparatus capable of penetrating to a depth of nearly six miles in the sea. Setting aside the question whether we could find in the stores of the Ark the materials that would be needed, it appears to me most improbable that we could make the apparatus of sufficient strength to withstand the pressure, and could then cause it to sink to so great a depth, and afterward bring it safely to the surface." The Frenchman smiled. "M. Versál," he replied, "I have taken the liberty to look over the stock of materials which you have so wisely prepared for possible repairs to the Ark and for use after the Ark lands, and I know that among them I can find all that I shall need. You yourself know how completely you are provided with engineering tools and machines of all kinds. You have even an electric foundry aboard. With the aid of your mechanical genius, and the skill of your assistants, together with that of my own men, who are accustomed to work of this kind, I have not the faintest doubt that I can design and construct a diving-bell, large enough to contain a half-dozen persons, and perfectly capable of penetrating to any depth. Of course I cannot make it of levium, but you have a sufficient supply of herculeum steel, the strength of which is so immense that the walls of the bell can be made to remit the pressure even at a depth of six miles. From my previous experiments I am confident that there will be no difficulty in sinking and afterward raising this apparatus. It is only necessary that the mean specific gravity of the bell shall be greater than that of the water at a given depth, and you know that as far back as the end of the nineteenth century your own countrymen sent down sounding apparatus more than six miles in the Pacific Ocean, near the island of Guam." "But the air inside the bell--" Cosmo began. "Excuse me," interrupted De Beauxchamps, "but that air need be under no greater pressure than at the surface. I shall know how to provide for that. Remember the _Jules Verne_. Simply give me _carte blanche_ in this matter, let me have the materials to work with, afford me the advantage of your advice and assistance whenever I shall need them, and I promise you that by the time we have arrived over the site of New York we shall be prepared for the descent."