"That is all right," commented Don Hermoso, when the statement was passed on to him; "the gentlemen of the customs will not be troubled with sleeplessness to-night!" Nor were they; for four bells in the first watch had scarcely struck when, with many yawns, they retired below and--those who were supposed to be on watch as well as those who were off--in ten minutes were sleeping like logs. "Now is our time, Phil, before the moon rises," exclaimed Jack, as soon as the report of the custom-house officers' retirement had been brought aft by the chief steward. "It is important to get the submarine into the water unobserved; but, that done, we can wait until midnight, or even later, before commencing operations. By that time everybody will have turned in; and moreover we shall have the light of the moon to help us." Accordingly, the canvas cover was removed from the particular boat in which the small submarine was hidden, and the mischievous little toy was carefully hoisted out, lowered into the water, submerged until only the top of her diminutive conning tower showed above water, and then effectually concealed by being moored to the boat boom, between the gig and the steam pinnace. Then advantage was taken of the darkness to pass down into her everything that had been prepared for the success of the forthcoming enterprise; after which everybody turned in, except Carlos, who undertook to keep a watch on deck until everything should seem sufficiently quiet in the harbour to admit of the adventurers beginning their work without incurring undue risk of detection. At length two bells in the middle watch (one o'clock) pealed out from the various ships in the harbour; the moon, just past the full, was riding high in the cloudless sky and affording quite as much light as the adventurers desired; and not a sound was to be heard save the faint moan of the wind in the rigging of the various craft in the harbour and the lap of the water alongside: everybody seemed to have gone to bed, except the anchor watch on board the men-o'-war--and they would probably lie down and endeavour to snatch a cat-nap until the moment should come round to again strike the bell. Carlos therefore thought the time propitious; and, treading noiselessly in his rubber-soled deck shoes, went below and quietly called Jack, Milsom, and Macintyre.