Macintyre was the first of the trio to appear on deck, for, his business being in the interior of the boat, he had no special dress to don; the pyjama suit in which he had been sleeping would serve as well as any other, and he accordingly wore it. Walking forward with bare feet, he slung himself over the rail, lay out on the boom, and, sliding down the painter of the steam pinnace, got on board that craft--as a "blind" to anyone who might perchance happen to have noticed his movements--and from thence surreptitiously transferred himself to the interior of the submarine--having already cast the boat adrift--which he immediately sealed by fastening down the hood of the little conning tower. Then he set the electric air-pump going, in order to store up for himself a supply of air sufficient to last until the return of the boat. And while this was doing he quietly dropped the boat astern until she lay in the deep shadow cast by the overhanging counter of the yacht, where the other two could board her without the slightest risk of being seen. Some ten minutes later Jack and Milsom appeared on deck, each attired in an improved Fleuss diving dress, by the use of which the necessity for air-pumps and pipes was done away with. Each man wore a long, stout, double-edged dagger in a sheath attached to his belt, as a protection against possible attacks by sharks, with which the waters of the harbour are known to swarm; while Milsom bore, in addition, a formidable lance for the same purpose, or, rather, for the purpose of protecting Jack while the latter worked. And each man wore, attached to his wrist by a lanyard, a small, light steel bar, about four inches long, to enable him to communicate with his companion--by means of the Morse code--by the simple process of tapping on his helmet. They also carried, attached to their belts, small but very powerful electric lanterns, the light of which they could switch on and off at will, to enable them to see what they were about. They had made all their arrangements during the previous day, and had exchanged a few brief last words just before screwing in the front glasses of their helmets. Each therefore knew exactly what he and his companion had to do, and they now accordingly proceeded straight aft, found the Jacob's ladder hanging over the yacht's stern, and by it descended to the submarine, Milsom going first and stationing himself on the boat's deck just abaft the conning tower, while Jack took the corresponding place on the fore side.