Six o'clock
`` 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 .