_Cullist_ was commanded by an officer who had served a long time off this coast in a sloop. Her real name was the _Westphalia_, but she was also known as the _Jurassic_, _Hayling_, and _Prim_. She was of 1,030 gross tons, and in the spring of 1917 was lying at Calais, when she was requisitioned and sent to Pembroke Naval Dockyard to be fitted out. She was commissioned on May 12 by Lieut.-Commander Simpson, and Admiral Bayly then sent her to cruise along certain trade routes. She was capable of steaming about 10 knots, and was armed with a 4-inch and two 12-pounder guns, as well as a couple of torpedo-tubes, and all these had been well concealed. A few weeks later, on July 13, _Cullist_ was between the Irish and French coasts, and it was just after 1 p.m. when a submarine appeared on the horizon. About two minutes later the enemy from very long range opened fire, but as his shots were falling about 3,000 yards short, he increased speed towards the _Cullist_. By 1.30 a large merchant ship was seen coming up from the south, so _Cullist_ hoisted the signal ‘You are standing into danger,’ whereupon the big steamer altered course away. _Cullist_ then zigzagged, keeping always between sun and enemy, and by dropping eight smoke-boxes at various intervals succeeded in enticing the submarine down to a range of 5,000 yards, a distance which was maintained for the rest of the action. From 1.45 the enemy continually straddled _Cullist_ so that the decks were wet with the splashes, and shell splinters were rattling on masts and deck. By 2.7 the enemy had fired sixty-eight rounds, but had not hit once. _Cullist_ now decided to engage, and her third round was seen to hit just below the submarine’s gun, the remainder hitting regularly along the deck and on the conning-tower, causing bright red flames which rose higher than the conning-tower. Three minutes after _Cullist_ had opened fire the enemy sank by the bows in flames, and then the ship steamed to the spot and dropped a depth charge. Three of _Cullist’s_ crew saw a corpse dressed in blue dungarees, floating face upwards, but the submarine was never seen again. By 3.30 H.M.S. _Christopher_ arrived on the scene and both ships searched for the enemy. He was evidently seriously damaged, but he had made his escape. Lieut.-Commander Simpson, for this engagement, was awarded a D.S.O; Lieutenant G. Spencer, R.N.R., a D.S.C.; Sub-Lieutenant G. H. D. Doubleday, R.N.R., also a D.S.C.; while two other officers were ‘mentioned.’