Then followed a sudden twist, which sent a thrill through both vessels; a crash; a backward jerk; the snapping of a chain; and in a moment the great rudder, with half of the rudder-post attached, was torn from the vessel, and as the forceps opened it dropped to leeward and hung dangling by one chain. Again the forceps opened wide; again there was a rush; and this time the huge jaws closed upon the rapidly revolving screw-propeller. There was a tremendous crash, and the small but massive crab turned over so far that for an instant one of its sides was plainly visible above the water. The blades of the propeller were crushed and shivered; those parts of the steamer's engines connecting with the propeller-shaft were snapped and rent apart, while the propeller-shaft itself was broken by the violent stoppage. The crab, which had quickly righted, now backed, still holding the crushed propeller in its iron grasp, and as it moved away from the Scarabaeus, it extracted about forty feet of its propeller-shaft; then, opening its massive jaws, it allowed the useless mass of iron to drop to the bottom of the sea. Every man on board the Scarabaeus was wild with amazement and excitement. Few could comprehend what had happened, but this very quickly became evident. So far as motive power was concerned, the Scarabaeus was totally, disabled. She could not direct her course, for her rudder was gone, her propeller was gone, her engines were useless, and she could do no more than float as wind or tide might move her. Moreover, there was a jagged hole in her stern where the shaft had been, and through this the water was pouring into the vessel. As a man-of-war the Scarabaeus was worthless. Orders now came fast from Repeller No. 1, which had moved nearer to the scene of conflict. It was to be supposed that the disabled ship was properly furnished with bulk-heads, so that the water would penetrate no farther than the stern compartment, and that, therefore, she was in no danger of sinking. Crab A was ordered to make fast to the bow of the Scarabaeus, and tow her toward two men-of-war who were rapidly approaching from the harbour. This proceeding astonished the commander and officers of the Scarabaeus almost as much as the extraordinary attack which had been made upon their ship. They had expected a demand to surrender and haul down their flag; but the Director-in-chief on board Repeller No. 1 was of the opinion that with her propeller extracted it mattered little what flag she flew. His work with the Scarabaeus was over; for it had been ordered by the Syndicate that its vessels should not encumber themselves with prizes. Towed by the powerful crab, which apparently had no fear that its disabled adversary might fire upon it, the Scarabaeus moved toward the harbour, and when it had come within a quarter of a mile of the foremost British vessel, Crab A cast off and steamed back to Repeller No. 1.