"The curious part of the affair is, though," he continued deliberately, "that this murder, as I suppose we must call it, bears none of the hall-marks of rude passion. On the contrary, it suggests in more ways than one the touch of the finished artist. The man's whole evening has been traced without the slightest difficulty. He dined at the Café Royal alone, promenaded afterwards at the Alhambra, and drove on about supper-time to the Continental. He left there at 12.30 with a couple of ladies whom he appeared to know fairly well, called at their flat for a drink, and sent one out to his cabby--rather unusual forethought for such a bounder. When he reappeared and directed the man to drive him to Cavendish Mansions, Battersea, the driver tried to excuse himself. Both he and his horse were dead tired, he said. Barnes, however, insisted upon keeping him, and off they went. At Cavendish Mansions, Barnes alighted and offered the man a sovereign. Naturally enough the fellow could not change it, and Barnes went in to get some silver from his rooms, promising to return in a minute or two. The cabby descended and walked to the corner of the street to see if he could beg a match for his pipe from any passer-by. He may have been away for perhaps five minutes, certainly no more, during which time he stood with his back to the Mansions. Seeing no one about, he returned to his cab, ascended to his seat, naturally without looking inside, and fell fast asleep. The next thing he remembers is being awakened by Wrayson here! So much for the cabby." "What a fine criminal judge was lost to the country, Colonel, when you chose the army for a career," Mason remarked, turning round to order some coffee. "Such coherence--such an eye for detail. Pass the matches, Wrayson. Thanks, old chap!" The Colonel smiled placidly. "I am afraid," he said, "that I should never have had the heart to sentence anybody to anything, but I must admit that things of this sort do interest me. I love to weigh them up and theorize. The more melodramatic they are the better." Heneage helped himself to a cigarette from Mason's case, and leaned back in his chair. "I never have the patience," he remarked, "to read about these things in the newspapers, but the Colonel's _résumé_ is always thrilling. Do go on. There won't be any pool till four o'clock." The Colonel smiled good-naturedly. "It's good of you fellows to listen to my prosing," he remarked. "No use denying that it is a sort of hobby of mine. You all know it. Well, we'll say we've finished with the cabby, then. Enter upon the scene, of all people in the world, our friend Wrayson!" "Hear, hear!" murmured Mason. Wrayson changed his position slightly. With his head resting upon his hand, he seemed to be engaged in tracing patterns upon the tablecloth.