As the water rose higher, Cosmo Versál's Ark at last left its cradle, and cumbrously floated off, moving first eastward, then turning in the direction of Brooklyn and Manhattan. Cosmo had his engines in operation, but their full power was not developed as soon as he had expected, and the great vessel drifted at the will of the currents and the wind, the latter coming now from one side and now from another, rising at times to hurricane strength and then dying away until only a spanking breeze swept the ever-falling rain into swishing sheets. Occasionally the wind failed entirely, and for many minutes at a time the water fell in vertical streams. At length the motive power of the Ark was developed, and it began to obey its helm. From the shelter of a "captain's bridge," constructed at the forward end of the huge levium dome that covered the vessel, Cosmo Versál, with Captain Arms, a liberally bewhiskered, veteran navigator in whose skill he confided, peered over the interminable waste of waters. There was nothing in sight except floating objects that had welled up from the drowned city and the surrounding villages. Here and there the body of an animal or a human being was seen in the tossing waves, and Cosmo Versál sadly shook his head as he pointed them out, but the stout mariner at his side chewed his tobacco, and paid attention only to his duties, shouting orders from time to time through a speaking-tube, or touching an electric button. Cosmo Versál brought a rain-gage and again and again allowed it to fill itself. The story was always the same--two inches per minute, ten feet per hour, the water mounted. The nebula had settled down to regular work, and, if Cosmo's calculations were sound, there would be no intermission for four months. After the power of the propellers had been developed the Ark was steered southeastward. Its progress was very slow. In the course of eight hours it had not gone more than fifty miles. The night came on, and the speed was reduced until there was only sufficient way to insure the command of the vessel's movements. Powerful searchlights were employed as long as the stygian darkness continued. With the return of the pallid light, at what should have been daybreak, Cosmo and his navigator were again at their post. In fact, the former had not slept at all, keeping watch through the long hours, with Captain Arms within easy call. As the light became stronger, Cosmo said to the captain: "Steer toward New York. I wish to see if the last of the tall buildings on the upper heights have gone under." "It will be very dangerous to go that way," objected Captain Arms. "There are no landmarks, and we may strike a snag." "Not if we are careful," replied Cosmo. "All but the highest ground is now buried very deep." "It is taking a fool's risk," growled Captain Arms, through his brush, but nevertheless he obeyed.