On July 17, he tried a new method of harassing the Turkish army. He came up opposite Kara Burnu and opened fire on the railway cutting west of it, blocking the line--then dived, and went on to Derinjie Burnu. The shipyard there was closed, but he observed a heavy troop train steaming west, towards the block he had so carefully established just before. He followed up at full speed, and after twenty minutes of anxious hope saw the train returning baffled. It eventually stopped in a belt of trees at Yarandji Station; this made spotting difficult, but E. 7’s gunnery was good enough. After twenty rounds the three ammunition cars of the train were definitely blown up, and E. 7 could move back to Kara Burnu, where she shelled another train and hit it several times. All this was very disturbing to the Turks, and they tried every means to stop it at the source. They had already a net in the channel, but it was quite ineffectual. ‘Now,’ says Mr. Einstein on July 15, ‘it turns out that they have constructed a barrage of network to keep out the submarines from the Dardanelles, and this explains the removal of the buoys all along the Bosphorus. They need these, and especially their chains, to keep it in place.’ A week later, Lieut.-Commander Cochrane saw these buoys on his way down. They were in a long line, painted alternately red and black, and stretching from a position a mile north of Maitos village to a steamer moored in Nagara Liman. He dived under them and went on his way; but later on, below Kilid Bahr, the boat fouled a moorings forward and was completely hung up, swinging round, head to tide. By admirable management she was got clear in half an hour, and then the same thing happened again. ‘This time,’ says her commander coolly, ‘I think the boat carried the obstruction with her for some distance. I was expecting to see something foul when we came to the surface, but everything was clear then.’ What he and his men saw, during those two half-hours, might also be described as ‘something foul.’