"I now knew, of course, that Mr. James Allerdyke had sent those jewels direct to Mr. Fullaway, immediately on his arrival in Hull, and that they had fallen by sheer accident into Van Koon's hands. But I wanted to know more. I wanted to know if Van Koon had any connection with this affair, and if, when he saw that the parcel was from Hull, he had immediately jumped to the conclusion that it might be from James Allerdyke, and might contain the actual valuables. Fortunately, Mr. Rayner had already made arrangements with a noted private inquiry agent to have Van Koon most carefully and closely watched. And the very day after I found and took possession of the jewels we received a report from this agent that Van Koon was in the habit of visiting the shop and manufactory of a German chemist named Schmall, in Whitechapel. Further, he had twice come away from it, after lengthy visits, in company with a man whom the agent's employees had tracked to the Hotel Cecil, and whom I knew, from their description, to be Mr. Merrifield, Mr. Delkin's private secretary.

"Naturally, having discovered this, we gave instructions for a keener watch than ever to be kept on both these men. But the name of the German chemist gave me personally a new and most important clue. There had been employed at the Waldorf Hotel, for some weeks up to the end of the first week in May, a German-Swiss young man, who then called himself Ebers. He acted as valet to several residents; amongst others, Mr. Fullaway. He was often in and out of Mr. Fullaway's rooms. Once, Mr. Fullaway being out, and I having nothing to do, I was cleaning up some photographic apparatus which I had there. This man Ebers came in with some clothes of Mr. Fullaway's. Seeing what I was doing, he got talking to me about photography, saying that he himself was an amateur. He recommended to me certain materials and things of that sort which he said he could get from a friend of his, a chemist, who was an enthusiastic photographer and manufactured chemicals and things used in photography. I gave him some money to get me a supply of things, and he brought various packets and parcels to me two or three days later. Each packet bore the name of Otto Schmall, and an address in a street which runs off Mile End Road.

"Now, when the private inquiry agent made his reports to Mr. Rayner and myself about Van Koon, and told us where he had been tracked to more than once, I, of course, remembered the name of Schmall, and Mr. Rayner and I began to put certain facts together. They were these:

"First.—Ebers had easy access to Mr. Fullaway's room at all hours, and was often in them when both Mr. Fullaway and I were out. Mr. Fullaway is notoriously careless in leaving papers and documents, letters and telegrams lying around. Ebers had abundant opportunities of reading lots of documents relating to (1) the Pinkie Pell pearls, and (2) the proposed Nastirsevitch deal.

"Second.—Ebers was a friend of Schmall. Schmall was evidently a man of great cleverness in chemistry.

"Third.—All the circumstances of Mr. James Allerdyke's death, and of Lisette Beaurepaire's death, pointed to unusually skillful poisoning. Who was better able to engineer that than a clever chemist?

"Fourth.—The jewels belonging to the Princess Nastirsevitch had undoubtedly fallen into Van Koon's hands. Van Koon was a friend of Schmall. So also, evidently, was Merrifield. Now, Merrifield, as Delkin's secretary, knew of the proposed deal.

"Obviously, then, Schmall, Van Koon, and Merrifield were in league—whether Ebers was also in league, or was a catspaw, we did not trouble to decide. But there was another fact which seemed to have some bearing, though it is one which I have never yet worked out—perhaps some of you know something of it. It was this: Just before he went to Russia, Mr. James Allerdyke, being in town, gave me a photograph of himself which Mr. Marshall Allerdyke had recently taken. I kept that photo lying on my desk at Mr. Fullaway's for some time. One day I missed it. It is such an unusual thing for me to misplace anything that I turned over every paper on my desk in searching for it. It was not to be found. Four days later I found it, exactly where it ought to have been. Now, you can draw your own conclusions from that—mine are that Ebers stole it, so that he could reproduce it in order to give his reproduction to some person who wanted to identify James Allerdyke at sight.

"However, to go forward to the discovery which we made about Schmall, Van Koon, and Merrifield. As soon as we made that discovery, Mr. Rayner was for going to the police at once, but I thought not—there was still certain evidence which I wanted, so that the case could be presented without a flaw. However, all of a sudden I saw that we should have to act. Ebers was found dead in a small hotel near the Docks, and at a conference in which Mr. Fullaway insisted I should join, in his rooms, and at which Van Koon, who had been playing a bluff game, was present, there was enough said to convince me that Van Koon and his associates would take alarm and be off with what they believed themselves to possess—the jewels in that parcel. So then Mr. Rayner and I determined on big measures. And they were risky ones—for me.

"I had already been down, more than once, into Whitechapel, and had bought things at Schmall's shop, and I was convinced that he was the man who accompanied Lisette Beaurepaire to that little hotel in Eastbourne Terrace. Now that the critical moment came, after the Ebers-Federman affair, I went there again. I got Schmall outside his premises. I took a bold step. I told him that I was a woman detective, who, for purposes of my own, had been working this case, and that I was in full possession of the facts. If I had not taken the precaution to tell him this in the thick of a crowded street, he would have killed me on the spot! Then I went on to tell him more. I said that his accomplice had led him to believe that he had the Nastirsevitch jewels in a parcel in his possession. I said that Van Koon was wrong—I had them myself—I told him how I got them. He nearly collapsed at that—I restored him by saying that the real object of my visit to him was to do a deal with him. I said that it did not matter two pins to me what he and his accomplices had done—what I was out for was money, nothing but money. How much would he and the others put up for the jewels and my silence? I reminded him of the fifty thousand pound reward. He glared at me like the devil he is, and said that he'd a mind to kill me there and then, whatever happened. Whereupon I told him that I had a revolver in my jacket pocket, that it was trained on him, and that if he moved, my finger would move just as quick, and I invited him to be sensible. It was nothing but a question of money, I said—-how much would they give? Finally, we settled it at sixty thousand pounds. He was to meet me here—to-day at two—the other two were to be about—the money was to be paid to me on production of the jewels, for which purpose one of them was to go with me to my boarding-house. And—you know the rest."