Availing itself of the privilege to creep through every chink and crevice, to steal up backstairs and take advantage of every keyhole, and to make its dismal presence felt equally within the habitations of man as without, the white fog had insinuated itself into the Bishop Street Police Station, where it lay in the form of a semi-transparent shroud, and where Inspector Robson looked more like the ghost of a man than the man himself. In the brightest of weather the office was not a cheerful apartment; under the thrall of the white fog, an hour after midnight, it assumed a funereal aspect inexpressibly depressing. Busily employed in making out the charge sheet for the following day, Inspector Robson still found time to cast an occasional eye upon another ghostly form who, with one foot resting on the end of a wooden bench, was leaning against the wall in a negligent attitude, engaged in the insubstantial occupation of chewing a ghostly straw. The Inspector wrote a fine copperplate hand, and his steel pen neither scratched nor spluttered. On the present occasion he was taking extraordinary care over his task, as though more than usually important issues hung upon the perfect outlines of his pothooks and hangers. The absence of sound within the office and the shroud which lay upon it, rendering objects within a few yards of him indistinct, imparted so strong an air of unreality to the scene, that his slow and measured movements bore some resemblance to the movements of an automaton. The other ghostly person in the office chewed his straw and moved his lips with so regular and unintelligent a motion that _his_ movements, also, bore some resemblance to the movements of an automaton. But for the difference in their ages these two men might have been posing to an invisible artist for a picture of the Industrious and the Idle Apprentices. That there was something in the negligent figure that discomposed the Inspector was evident from the expression on his face when he raised his head from the charge sheet and glanced in that direction, and it was quite as evident that his discomposure was powerless to arouse the cause of it from his apparent insensibility to all external objects and impressions. He was young and good-looking, his age probably twenty-four or five; Inspector Robson was old enough to be his father, and on his features were stamped the effects of long years of official responsibilities and steady application to duty. In this relation of the Idle and the Industrious Apprentices the marked contrast they presented was capable of a dramatic interpretation. "Do you intend to remain much longer?" inquired the Inspector, goaded at length into breaking the oppressive silence. "Because I'd like you to know I'm pretty well tired of you." "I'm pretty well tired of myself," replied the young man, in a listless tone. "As to remaining much longer I can't exactly say."