On June 8 four fishing smacks were captured and sunk off the Start in full view of the Q-smack _Prevalent_, a Brixham trawler armed with a 12-pounder. Again it happened to be a calm, so _Prevalent_, being too far away, was unable to render assistance. After this incident it was decided to fit an auxiliary motor in the trawler-yacht _Brown Mouse_, which was doing similar service and was specially suitable for an engine. On the following day our friend _Helgoland_ had another encounter, this time off the north coast of Ireland, the exact spot being 8 miles N. by W. of Tory Island. The fight began at 7.25 a.m., and half an hour later the submarine obtained a direct hit on the after-gun house of the brigantine, killing one man, wounding four ratings, and stunning the whole of the after-guns’ crews. But _Helgoland_, with her charmed life, was not sunk, and she shelled the submarine so fiercely that the U-boat had to dive and disappear. Even a private yacht was taken up for this work in June. This was the 116-ton topsail schooner _Lisette_, which had formerly belonged to the Duke of Sutherland. She had been built as far back as 1873 with a standing bowsprit and jibboom. She was taken from Cowes to Falmouth, where she was commissioned in August, and armed with three 6-pounders. But this old yacht was found to leak so much through her seams, and her construction was so light, that she was never a success, and was paid off in the following spring. In April, 1917, the auxiliary schooner _Sidney_ (alias _Glen_) began service as a decoy, having been requisitioned from her owners and fitted out at Portsmouth. A crew was selected from the Trawler Reserve, but the guns’ crews were naval. Armed with a 12-pounder and a 3-pounder, she was fitted with wireless, and cruised about in the English Channel, her complement consisting of Lieutenant R. J. Turnbull (R.N.R.), in command, one sub-lieutenant (R.N.R.), one skipper (R.N.R.), two R.N.R. seamen, one R.N.R. stoker to run the motor, a signal rating, a wireless operator, four R.N. ratings for the big gun, and three for the smaller one. During the afternoon of July 10, 1917, _Glen_ was in combat with a submarine of the UC type, and had lowered her boat in the customary manner. A German officer from the conning-tower hailed the boat, and in good English ordered her to come alongside. This was being obeyed, when something seemed to startle the officer, who suddenly disappeared into the conning-tower, and the submarine began to dive. _Glen_ therefore opened fire, and distinctly saw two holes abaft the conning-tower as the UC-boat rolled in the swell. She was not seen again, and the Admiralty rewarded _Glen’s_ captain and Sub-Lieutenant K. Morris, R.N.R., with a D.S.C. each.