Where the two boats, joined by a platform, had been, was a patch of discoloured water, on which shattered fragments of timber were bobbing in the strong sunlight. Had the working-party not ceased work to convey the rival divers to the yacht, no one would have escaped the force of the explosion. "This is not the work of one man," declared Villiers. "Let's get ashore." The suggestion was promptly acted upon, and on gaining the beach Harborough and his companions were greeted by the spectacle of Dick Beverley and Pete, armed with rifles, driving before them a couple of the _Zug's_ crew, who marched with arms upheld in the good old-fashioned way they were taught in the Great War. "Pete and I had been after pigs," explained Dick. "We were on our way back when we saw two strange men lying face downwards on the cliff, apparently watching the _Titania_. Of course, we couldn't do anything then, except watch them, because the land isn't our private property, but when that explosion went off and they began laughing and shaking hands we thought it time to have a say in the matter. We did," he added grimly, "and they came quietly." The prisoners, finding that they were not beaten, kicked, or otherwise misused by their captors after the custom of certain German officers in charge of prison-camps during the war, became fairly communicative. Four men, under the command of Siegfried Strauss, had left Ni Telang in one of the _Zug's_ boats, and landed on Nua Leha close to the spot where Dick had met with a mishap during his first pig-hunting expedition. Leaving one man in charge of the boat, Strauss and the other three, carrying explosives, an electric automatic time-fuse, and two divers' suits, crossed the island, keeping under the shelter of the palm groves until they reached the cove where the two sea-planes had been berthed. While two of the men kept watch, Siegfried and a companion donned their diving-dresses and walked into the sea. What happened could only be left to conjecture, unless Strauss at a later date thought fit to explain his movements. Apparently they found the wreck and placed their explosive charges in position. Upon the return journey they became separated. His course deflected by the current, Strauss found himself confronted by Swaine, the former's astonishment being almost as great as the latter's. Of the fate of the other Hun diver nothing was ever known. He might have been eaten by a shark, or he might have lost direction and been killed by the shock of the explosion, or else, which was more likely, he was asphyxiated owing to the failure of his air-supply. That afternoon Merridew, O'Loghlin, Griffiths, and Bell, all armed, proceeded to the place where the _Zug's_ boat lay. They made an easy capture of the last member of the submarine raiding-party, and, what was a welcome prize, the boat as well--a stoutly-built 25-feet cutter.