E. 35 has a chase to her credit, in some respects very similar to this one; but the story is worth adding, because of the masterly precision with which the Commander, Lieutenant D’Oyly Hughes, conducted the manœuvre and reported it afterwards. At 4 o’clock, on a May afternoon, he sighted in the periscope a low-lying object two to three miles distant on the port beam. His own boat was at 26 feet, and the object was only visible intermittently, when on top of a wave--it was impossible to be certain about it. He turned at once and went straight for it, speeding up as he did so. But this led to immediate difficulties. There was a long breaking swell across his course and a strong wind. Depth keeping was almost impossible, and there was a constant risk of E. 35 breaking surface and throwing away her chance. It was necessary to go down to quieter levels, and for some time she travelled at 40 feet with full speed on. At 4.18, Lieutenant D’Oyly Hughes reduced speed and brought her up again to 26 feet. His first observation, on looking into the periscope, was that the bearing had changed; and secondly, that the floating object was without doubt a large enemy submarine. He headed at once to cut her off--she was making slowly off northwards--and dived to 40 feet in order to increase to full speed himself. After a twenty-four minutes’ run he slowed down again for periscope observation, ordering the boat to be brought to 23 feet. This was a very anxious moment, for the sea once more all but gave him away. The swell rolled E. 35 up till she was actually for an instant breaking surface, within 1,800 yards of the enemy. She was got down again to 26 feet without having been seen, and her commander then very skilfully placed her in the trough of the sea, where he could pursue the chase on a slightly converging course instead of following right astern. On this course, which soon became absolutely parallel to that of the enemy, he remained at periscope depth for another half hour; then at 5.20, observing that he was not gaining fast enough, he dived again to 40 feet and speeded up, at the same time bringing a torpedo-tube to the ‘ready.’ At 5.35 he slowed once more for observation, and found the range had decreased to 1,100 yards. Down he went again for another spurt. At 5.53, he was within 900 yards; but as the parallel courses of the two boats were only a little more than 100 yards apart, he was ‘still very fine on enemy’s port quarter’--the shot was almost a bow-chaser shot and practically hopeless. He dived again, and for twenty-four more minutes patiently continued to observe and spurt alternately.