Pretending not to see the submarine, and keeping on her course like a real collier, Lieutenant Wardlaw’s ship jogged quietly along, but he was closing up his gun’s crews behind their screens and the mercantile crew were standing by ready to hoist out the ship’s boats when required. The German now started up his oil-engines and came on at full speed towards the _Prince Charles_. It had just gone seven o’clock and the submarine was 3 miles off. The collier had hoisted her colours and the enemy was about five points on the bow when a German shell came whizzing across. This fell 1,000 yards over. Lieutenant Wardlaw now stopped his engines, put his ship head on to the Atlantic swell, blew three blasts, and then ordered the crew to get the boats out, in order to simulate the movements of an ordinary merchant ship in the presence of an attacking submarine. In the meantime the enemy was approaching rapidly and fired a second shot, which fell between the funnel and the foremast, but landed 50 yards over. When the range was down to 600 yards the enemy turned her broadside on to the collier and continued firing; and this was now the time for the Q-ship’s captain to make the big decision. Should he maintain his pretence and continue to receive punishment, with the possibility of losing ship and lives in the hope that the submarine would come nearer? Or should he reveal his identity and risk everything on the chance of winning all? This was always the critical moment when the Q-ship captain held in his judgment the whole fate of the fight, of the ship, and his men. Lieutenant Wardlaw, seeing that the enemy could not be enticed to come any nearer, took the second alternative, and opened fire with his port guns. The effect of this on the German was remarkable and instantaneous; for her gun’s crew at once deserted the gun and darted down into the conning-tower. But whilst they were so doing, one of _Prince Charles’s_ shells struck the submarine 20 feet abaft the conning-tower. The enemy then came round and showed her opposite broadside, having attempted to dive. She now began to rise again as the collier closed to 300 yards, and frequent hits were being scored by the British guns. By this time the surprised Germans had had more than enough, and were observed to be coming out of the conning-tower, whilst the submarine was settling down by the stern. Still the British fire continued, and when the submarine’s bows were a long way out of the water, she took a sudden plunge and disappeared. A large number of men were then seen swimming about, and the _Prince Charles_ at once made every effort to pick them up, fifteen officers and men being thus saved out of thirty-three.