“Some time later, a month or so after my promotion to Chief Inspector, my attention was attracted to a big burly man, I thought I had seen somewhere before, coming out in a hurry from a jeweller’s shop in the Strand. I went after him, as it was on my way towards Charing Cross, and there seeing one of our detectives across the road, I beckoned him over, and pointed out the fellow to him, with instructions to watch his movements for a couple of days, and then report to me. No later than next afternoon my man turned up to tell me that the fellow had married his landlady’s daughter at a registrar’s office that very day at 11.30 a.m., and had gone off with her to Margate for a week. Our man had seen the luggage being put on the cab. There were some old Paris labels on one of the bags. Somehow I couldn’t get the fellow out of my head, and the very next time I had to go to Paris on service I spoke about him to that friend of mine in the Paris police. My friend said: ‘From what you tell me I think you must mean a rather well-known hanger-on and emissary of the Revolutionary Red Committee. He says he is an Englishman by birth. We have an idea that he has been for a good few years now a secret agent of one of the foreign Embassies in London.’ This woke up my memory completely. He was the vanishing fellow I saw sitting on a chair in Baron Stott-Wartenheim’s bathroom. I told my friend that he was quite right. The fellow was a secret agent to my certain knowledge. Afterwards my friend took the trouble to ferret out the complete record of that man for me. I thought I had better know all there was to know; but I don’t suppose you want to hear his history now, sir?” The Assistant Commissioner shook his supported head. “The history of your relations with that useful personage is the only thing that matters just now,” he said, closing slowly his weary, deep-set eyes, and then opening them swiftly with a greatly refreshed glance. “There’s nothing official about them,” said the Chief Inspector bitterly. “I went into his shop one evening, told him who I was, and reminded him of our first meeting. He didn’t as much as twitch an eyebrow. He said that he was married and settled now, and that all he wanted was not to be interfered in his little business. I took it upon myself to promise him that, as long as he didn’t go in for anything obviously outrageous, he would be left alone by the police. That was worth something to him, because a word from us to the Custom-House people would have been enough to get some of these packages he gets from Paris and Brussels opened in Dover, with confiscation to follow for certain, and perhaps a prosecution as well at the end of it.” “That’s a very precarious trade,” murmured the Assistant Commissioner. “Why did he go in for that?” The Chief Inspector raised scornful eyebrows dispassionately.