But aware or unaware, the pirates were doomed--caught in the act, and helpless as they had thought to find their victim. _Lorna’s_ helm flew over to starboard. The ship swung, in one swift curve, through the intervening fifty yards, and in two minutes from sighting her enemy she was right over the periscope. The U-boat dipped, but far too late; as _Lorna_ passed over the spot a shuddering jar was felt throughout her--her keel had struck the conning-tower, but so lightly that the pirates below probably thought they had escaped destruction for this time. A moment later they knew their error. Down came _Lorna’s_ first depth-charge, set to fifty feet. The helm went over still further to starboard, and the second charge dropped about fifty feet from the first, and at the same depth. Both charges detonated, and it was impossible to believe that they could have failed to destroy or seriously cripple the U-boat. They must have exploded in the most dangerous way possible, just alongside and underneath the target, where the resistance would be the maximum. The proof came a few moments afterwards. While continuing his circle, in order to pass again over the spot and make sure, Lieutenant Tottenham suddenly sighted four objects in the water among the disturbance caused by the two explosions. He turned and steered direct for the place, expecting to find wreckage of some kind; but on arriving, at full speed, he saw an astonishing tumult of water, caused by an upward rush of air, gas, and oil, which showed beyond doubt that the U-boat was immediately below. The next moment was a terrible one. As _Lorna’s_ third depth-charge dropped into this seething cauldron, cries of ‘Kamerad!’ were heard, and those on the yacht’s deck, looking back as she raced over, saw the new explosion hurl into the air the bodies of four men, who for a brief instant had been survivors from the sunken U-boat. Lieutenant Tottenham eased down and returned to pick them up. One was found still crying ‘Help!’ and ‘Kamerad!’ but the other three were already dead, from the effect of the explosion, or of the thick mass of oil in which they were submerged. About the unhappy prisoner there was no doubt. He was seriously injured internally, and was gone in three hours’ time. He lived and died in a cruel and cowardly business, but if care and kindness could have saved him, _Lorna_ would have brought him into port and been glad to do it. This submarine was U.B. 74. She was a week out, and had already sunk three ships when she was caught. Her commander was Ober-Leutnant Schtiendorf, and his name will be found in the list of the 150, for his case was among those marked as ‘Known.’