It was a dirty trick to play after a surrender. Had the explosions occurred a few minutes later, we should probably have lost some of our own men, as boats were about to put off to the submarine with a boarding party. If the case had been reversed, and the crew of a British stranded ship had done this thing, the Germans would undoubtedly have shot them, had there been any left to shoot; for probably shell and machine-gun fire would have been playing upon our men both before they had abandoned the ship and afterwards while they were in the water--as witness the E13. The German prisoners taken from the submarine, however, were treated by the British in a humane fashion. And yet, as it turned out, the treacherous Hun had yet another and more dangerous trap arranged for us. Time having been allowed for any possible further explosions on the enemy boat, Torpedo-Lieutenant Paterson and two other officers went off to her, in order to ascertain her condition. They found that the examination could be more easily carried out at low water. So two hours later, when the tide had fallen, they again visited the ship. She proved to be a submarine mine-layer, the U.C. 5, full of mines. She had been badly holed by the explosions, and the water was surging about inside of her. The Admiralty were very anxious to salvage her, for she was the first German submarine that had fallen into our hands, and she would afford us the opportunity of learning whatever secrets a German "U" boat might contain. But it was obvious that it would be impossible to tow her into harbour without proper salvage plant. As it turned out, the salving of her proved a long job, occupying twenty-seven days of anxious and arduous work. A salvage officer and divers were got from the port to do the preliminary work and get all ready before the arrival on the scene of Commodore Young, R.N.R., and the heavy salvage plant. The mines in the submarine, of course, presented a serious danger, and Lieutenant Paterson was told off as mine adviser to the salvage people. First, exercising due caution, he made a careful examination of the wreck, which resulted in the discovery of what appears to have been the other Hun trap. He found that two of the mines had been loosed and were projecting through the bottom of the mine-tubes. Had attempts been made to raise the submarine, the mines would have fallen out, and their explosion would probably have annihilated the submarine, the salvage ships, and those engaged in the salvage work.