All night and all the following day the Sylph followed the Emden. Several times the Emden put about, and made as if to give chase, but on each occasion the Sylph also changed her course. The relative positions of the two vessels remained the same, except that in the light of day the Sylph put more distance between her and her quarry. Night drew on once more, and again the Sylph approached closer. It was plain that this remorseless pursuit was worrying the commander of the Emden and that he did not know which way to turn to avoid his pursuer. Lord Hastings sniffed the air. "Feels like there would be a fog tonight," he said. "I hope it is not so dense as to dim the glow of the searchlight." But in this he was doomed to disappointment. The fog descended, but still those on the Sylph could dimly make out the outline of the Emden. But with the approach of morning, while Jack had the bridge, the fog suddenly thickened, and blotted out the pursued vessel entirely. Quickly Jack summoned Lord Hastings. Immediately Lord Hastings ordered the searchlight extinguished and all lights on board put out. "We don't want to let him know where we are," he said. "I feel absolutely certain that Captain von Mueller will double back and try to come up upon us in the fog. We must avoid that at all hazards, and at the same time must so maneuver as to be near enough to pick him up when the fog lifts." Lord Hastings altered the course of the Sylph slightly, but continued to go forward. Six o'clock came and no sign of the Emden, and then seven. And then the fog lifted as suddenly as it had descended, and at that moment there was the sound of a big gun and a shell whistled over the stern of the Sylph. A mile in the offing, having put about, was the Emden. She had maneuvered even as Lord Hastings had figured, and had run clear by the Sylph in the darkness. "Full speed ahead!" commanded Lord Hastings. The Sylph leaped quickly forward, as the bell tinkled the signal to the engine-room, running rapidly to get out of range of the Emden's guns and torpedoes. Several times, without reducing the speed of his ship, Lord Hastings swerved in his course, and thus spoiled the aim of the German gunners. And then the Emden's shells began to fall short. The Sylph was out of range. For an hour the Emden continued her pursuit, and then once more put about and herself became the pursued, the Sylph following relentlessly on her heels. It was near noon when the wireless operator aboard the Sylph approached Lord Hastings. "Have just picked up the Australian cruiser Sydney, sir. I gave him our identity and Captain Glossop pays his respects to you, sir." Lord Hastings jumped to action in a moment. "Where is he now?" The operator gave the position of the Sydney. "A hundred miles away," mused Lord Hastings. He led the way to the wireless room.