Some of the girls had exchanged their skirts for brown linen trousers. Those were the girls working the travelling cranes which, moving up and down the whole length of the factory, carried the shells from one lathe to another as they passed through the many processes between drilling and varnishing. Ella was among these latter, and certainly nobody who met her in her Dutch cap with its blue band, her linen overall jacket with its waistband, and her trousers, stained in places with oil, would have ever recognised her as the star of London revue. Lithely she mounted the straight steep iron ladder up to her lofty perch on the crane, and, seating herself, she touched the switch and began to move along the elevated rails over the heads of the busy workers below. The transfer of a shell from one lathe to another was accomplished with marvellous ease and swiftness. A girl below her lifted her hand as signal, whereupon Ella advanced over her, and let down a huge pair of steel grips which the lathe-worker placed upon the shell, at the same time releasing it from the lathe. Again she raised her hand, and the shell was lifted a few yards above her head and lowered to the next machine, where the worker there placed it in position, and then released it to undergo its next phase of manufacture. Such was Ella's work. In the fortnight she had been there she had become quite expert in the transfer of the huge shells, and, further, she had become much interested in her new life and its unusual surroundings In that great place the motive force of all was electricity. All those whirring lathes, drills, hammers, saws, cutting and polishing machines, cranes, everything in that factory, as well as the two other great factories in the near vicinity, were driven from the great electrical power-station close by. Now and then, as the night hours passed, though within all was bright and busy as day, Ella would give a glance at the woman working the crane opposite hers, a thin-faced, dark-haired young woman, who was none other than the mysterious friend of the man Cole, and whom she held in great suspicion. While Ella worked within the factory in order to keep a watchful eye, Seymour Kennedy watched with equal shrewdness outside. The days went past, but nothing suspicious occurred until one night Cole, who was again living at the temperance hotel, joined the munition-workers' train, being followed by Ella, who found that he had been engaged as an electrician in the power-house. Next day he met the thin-faced young woman, who was known to her fellow-workers as Kate Dexter, and they spent several hours together, at lunch and afterwards at a picture-house. But, friends as they were, when they left the Central Station they took care never to travel in the same carriage. So, to their fellow-workers, they were strangers.