J. T. Maston, the brothers Blomsberry, and Engineer Murchison, without heeding these dangers, took their places in the air-chamber. The commander, posted on his bridge, superintended the operation, ready to stop or haul in the chains on the slightest signal. The screw had been shipped, and the whole power of the machinery collected on the capstan would have quickly drawn the apparatus on board. The descent began at twenty-five minutes past one at night, and the chamber, drawn under by the reservoirs full of water, disappeared from the surface of the ocean. The emotion of the officers and sailors on board was now divided between the prisoners in the projectile and the prisoners in the submarine apparatus. As to the latter, they forgot themselves, and, glued to the windows of the scuttles, attentively watched the liquid mass through which they were passing. The descent was rapid. At seventeen minutes past two, J. T. Maston and his companions had reached the bottom of the Pacific; but they saw nothing but an arid desert, no longer animated by either fauna or flora. By the light of their lamps, furnished with powerful reflectors, they could see the dark beds of the ocean for a considerable extent of view, but the projectile was nowhere to be seen. The impatience of these bold divers cannot be described, and having an electrical communication with the corvette, they made a signal already agreed upon, and for the space of a mile the Susquehanna moved their chamber along some yards above the bottom. Thus they explored the whole submarine plain, deceived at every turn by optical illusions which almost broke their hearts. Here a rock, there a projection from the ground, seemed to be the much-sought-for projectile; but their mistake was soon discovered, and then they were in despair. “But where are they? where are they?” cried J. T. Maston. And the poor man called loudly upon Nicholl, Barbicane, and Michel Ardan, as if his unfortunate friends could either hear or answer him through such an impenetrable medium! The search continued under these conditions until the vitiated air compelled the divers to ascend. The hauling in began about six in the evening, and was not ended before midnight. “To-morrow,” said J. T. Maston, as he set foot on the bridge of the corvette. “Yes,” answered Captain Blomsberry. “And on another spot?” “Yes.” J. T. Maston did not doubt of their final success, but his companions, no longer upheld by the excitement of the first hours, understood all the difficulty of the enterprise. What seemed easy at San Francisco, seemed here in the wide ocean almost impossible. The chances of success diminished in rapid proportion; and it was from chance alone that the meeting with the projectile might be expected.