When I got up to take his place again, it was night. The generators were beating steadily, and the Omnimobile was ploughing her way through heavy seas. The sky was black, and occasional brilliant flashes of lightning lit the sheets of falling rain that drummed on the metal deck. When he showed me our position, it was in the Pacific, off Central America. I knew that he had used the rocket tubes to carry us over the Isthmus. For two more days we kept the bow southwest, in the direction of the Mangar Deep. Sam and I alternated at the controls, and he took time to prepare our meals when he was off duty. The cabin was fixed up most comfortably with bookcases, table, and upholstered divan. During the second long afternoon I looked over my old stories of science, and read again Verne's immortal story, _Twenty Thousand Leagues Under the Sea_. I was somewhat amused at the thought that I was aboard a stranger and more wonderful machine than that of the fantastic tale, and that our adventures had already been far more amazing than those of the great romance at which so many practical people had scoffed. If I had known what was to come--well, I suppose I could not have composed myself enough to read at all! At evening on the third day, the sea lay cold and blue about us, and the northern sun was crawling along the horizon to sink cold and bright in the clear north-western sky, turning the westward waves into a glittering sea of frozen fire, and gleaming with prismatic whiteness on the snow caps of a few vast icebergs that dotted that far southern sea. Sam stopped the engines. We floated in that wintry, lonely ocean, infinitely removed from the busy world of man, over the Mangar Deep--over the lair of the hidden menace! I stood on the gleaming wet metal deck, shivering slightly from the chill of the keen south wind, breathing deep of the fresh salty air, and lost in the never-aging wonders of the sea and sky. I felt even a distant kinship with the blue, white-capped mountains of ice that lifted their massive frozen spires to meet the cold sunshine. How often, in the incredible adventure to come, was I to fear that I was never again to see the blue of the sky, or to feel the ancient spell of a limitless surging sea! I took a last deep breath, and went below. I was a little surprised to see that Sam was closing the ventilators, opening the oxygen apparatus and air purifiers, inspecting the pumps and valves, getting ready to dive. "Surely we can't start till morning?" "Why not? At two hundred fathoms night is the same as day." "I hadn't thought of that. Then--" "Before we see the sky again, we shall know--" With a queer tightening in my throat, I saw the manhole closed for the last time upon the fresh, cold air of the sea. In ten minutes more we had let the water into the buoyancy tanks. Green water and gleaming monsters of the sea rushed upward in the steady glare of the searchlights beyond the windows.