"I'm fishing," answered Foyle enigmatically. "I couldn't have better bait than Ivan. There are three men sticking to him like limpets now, and a couple are keeping an eye on Sir Ralph Fairfield. I think that will be all right. Do you remember the Mighton Grange case? We knew there had been a murder, but couldn't do anything till we found the body. Dutful, the murderer, would have slid off to some place where there's no extradition, but for the fact that I had him arrested on a charge of being in the unlawful possession of a pickaxe handle. This affair is the converse of that. We can't afford to have Ivan under lock and key." Sir Hilary Thornton bit his lip and looked steadfastly at the scarlet geranium on the window-sill, as though in search of enlightenment. "I believe I see," he exclaimed after a pause. "Ivan must have been something more than a valet. He's a superior type of man, and the conclusion to be drawn if he knows that Grell is alive----" "Precisely," interrupted the superintendent. "Any result from the offer of a reward for Goldenburg?" A flicker of amusement dwelt in Heldon Foyle's blue eyes. "Yes. He has been seen by different people within an hour or two of each other in Glasgow, Southampton, Gloucester, Cherbourg, Plymouth, and Cardiff. Our information on that point is not precisely helpful. Of course, we've got the local police making inquiries in each case, but I don't anticipate they will find out much. Still, it will keep 'em amused." The necessity of a conference broke up further conversation. Gathered in the building were some thirty or forty departmental chiefs of the C.I.D., the picked men of their profession. Most of them were divisional detective inspectors who were in charge of districts, and some few were men who had special duties. They were ranged about tables in a lofty room, its green distempered walls hung with stiff photographs of living and retired officials. Men of all types were there, from the spruce, smartly groomed detectives of the West End to the burly, ill-dressed detectives of the East. Between them they spoke every known language. Here was Penny, who had specialised in forgeries; Brown, who knew every trick of coiners; Malby, the terror of race-course sharps; Menzies, who had as keen a scent for the gambling hell as a hound for a fox; Poole, who was intimate with the ways of railway thieves and shoplifters. Not one but thoroughly understood his profession, and knew where to look for his information. Foyle took the chair, and the buzz of conversation became general. It was a business conference of experts. Views were exchanged on concrete problems; the movements of well-known criminals discussed. "Velvet-fingered Ned" had disappeared from Islington and reappeared in Brixton. "Tony" Smith was due out of prison. Mike O'Brien had patched up the peace with "Yid" Foster, and when they got together----