The commander, Kapitän-Leutnant Gustav Amberger, his three other officers and thirty-five men were prisoners. They were given hot coffee, sandwiches and cigarettes, and men of the _Fanning_ loaned their warm clothing. No prisoners were ever better treated. As they entered the boats that were to take them ashore, they cheered the _Fanning_ and its crew. A larger volume than this would be required to detail all the exploits of our destroyers in European waters, or even to give the reports of their contacts with submarines. But a few examples will give some idea of the work they did. Not long after her arrival in Queenstown, the _O'Brien_ (Lieutenant Commander C. A. Blakely) defeated a U-boat which was trying to attack the British steamer _Elysia_, twelve miles south of Ballycotton Light, off the Irish coast. This encounter occurred at 4:21, June 16, 1917, and the London Headquarters' report of June 20th, said: It is reasonably certain now that the _O'Brien_ destroyed the submarine mentioned. She was escorting a valuable ship when the two periscopes of a submarine were observed about 800 yards on her bow. She altered course immediately, headed for it, and increased to full speed. The periscopes were again seen about a minute later about 100 yards dead ahead, the submarine having apparently attempted to avoid the _O'Brien_ and torpedo her escort astern of her. From the last position sighted, the submarine apparently started to dive, and must have barely escaped being rammed. The lookout on the top observed her hull distinctly alongside the _O'Brien_ and gradually disappearing as she proceeded downward, on almost exactly the opposite course to the _O'Brien_. A depth-charge was dropped when the submarine was under the after deck-house, and although the _O'Brien_ was making 20 knots by this time, less than three minutes after the submarine had been sighted, the explosion of the depth-charge gave the ship a very severe shaking. The _O'Brien_ circled over the spot, but saw no evidence of damage. A British destroyer passing over the same spot, nearly three hours later found and reported large patches of strong-smelling oil. The _Cushing_, on the following morning, passed the same area and also reported a large amount of oil. This incident occurred just off Queenstown entrance and was unfortunately one of those cases the exact results of which cannot be determined.