But neither the official police nor Holmes's own small but very efficient organization sufficed to clear away the mystery. Amid the crowded millions of London the three persons we sought were as completely obliterated as if they had never lived. Advertisements were tried, and failed. Clues were followed, and led to nothing. Every criminal resort which Shlessinger might frequent was drawn in vain. His old associates were watched but they kept clear of him. And then suddenly, after a week of helpless suspense, there came a flash of light. A silver-and-brilliant pendant of old Spanish design had been pawned at Bovington's, in Westminster Road. The pawner was a large clean-shaven man of clerical appearance. His name and address were demonstrably false. The ear had escaped notice, but the description was surely that of Shlessinger.

Three times had our bearded friend from the Langham called for news – the third time within an hour of this fresh development. His clothes were getting looser on his great body. He seemed to be wilting away in his anxiety. "If you will only give me something to do!" was his constant wail. At last Holmes could oblige him.

"He has begun to pawn the jewels. We should get him now."

"But does this mean that any harm has befallen the Lady Frances?"

Holmes shook his head very gravely. "Supposing that they have held her prisoner up to now, it is clear that they cannot let her loose without their own destruction. We must prepare for the worst."

"What can I do?"

"These people do not know you by sight?"

"No."

"It is possible that he will go to some other pawnbroker in the future. In that case, we must begin again. On the other hand, he has had a fair price and no questions asked, so if he is in need of ready-money he will probably come back to Bovington's. I will give you a note to them, and they will let you wait in the shop. If the fellow comes you will follow him home. But no indiscretion and, above all, no violence. I put you on your honor that you will take no step without my knowledge and consent."

For two days the Hon. Philip Green (he was, I may mention the son of the famous admiral of that name who commanded the Sea of Azof fleet in the Crimean War) brought us no news. On the evening of the third he rushed into our sitting-room, pale, trembling, with every muscle of his powerful frame quivering with excitement. "We have him! We have him!" he cried.

He was incoherent in his agitation. Holmes soothed him with a few words and thrust him into an armchair. "Come, now, give us the order of events," said he.

"She came only an hour ago. It was the wife, this time, but the pendant she brought was the fellow of the other. She is a tall, pale woman, with ferret eyes."

"That is the lady," said Holmes.

"She left the office and I followed her. She walked up the Kennington Road, and I kept behind her. Presently she went into a shop. Mr. Holmes, it was an undertaker's."

My companion started. "Well?" he asked in that vibrant voice which told of the fiery soul behind the cold gray face.

"She was talking to the woman behind the counter. I entered as well. 'It is late,' I heard her say, or words to that effect. The woman was excusing herself. 'It should be there before now,' she answered. 'It took longer, being out of the ordinary.' They both stopped and looked at me, so I asked some question and then left the shop."

"You did excellently well. What happened next?"

"The woman came out, but I had hid myself in a doorway. Her suspicions had been aroused, I think, for she looked round her. Then she called a cab and got in. I was lucky enough to get another and so to follow her. She got down at last at No. 36 Poultney Square, Brixton. I drove past, left my cab at the corner of the square, and watched the house."

"Did you see anyone?"

"The windows were all in darkness save one on the lower floor. The blind was down, and I could not see in. I was standing there, wondering what I should do next, when a covered van drove up with two men in it. They descended, took something out of the van, and carried it up the steps to the hall door. Mr. Holmes, it was a coffin."

"Ah!"

"For an instant I was on the point of rushing in. The door had been opened to admit the men and their burden. It was the woman who had opened it. But as I stood there she caught a glimpse of me, and I think that she recognized me. I saw her start, and she hastily closed the door. I remembered my promise to you, and here I am."

"You have done excellent work," said Holmes, scribbling a few words upon a half-sheet of paper. "We can do nothing legal without a warrant, and you can serve the cause best by taking this note down to the authorities and getting one. There may be some difficulty, but I should think that the sale of the jewelry should be sufficient. Lestrade will see to all details."

"But they may murder her in the meanwhile. What could the coffin mean, and for whom could it be but for her?"

"We will do all that can be done, Mr. Green. Not a moment will be lost. Leave it in our hands. Now, Watson," he added as our client hurried away, "he will set the regular forces on the move. We are, as usual, the irregulars, and we must take our own line of action. The situation strikes me as so desperate that the most extreme measures are justified. Not a moment is to be lost in getting to Poultney Square.

"Let us try to reconstruct the situation," said he as we drove swiftly past the Houses of Parliament and over Westminster Bridge. "These villains have coaxed this unhappy lady to London, after first alienating her from her faithful maid. If she has written any letters they have been intercepted. Through some confederate they have engaged a furnished house. Once inside it, they have made her a prisoner, and they have become possessed of the valuable jewelry which has been their object from the first. Already they have begun to sell part of it, which seems safe enough to them, since they have no reason to think that anyone is interested in the lady's fate. When she is released she will, of course, denounce them. Therefore, she must not be released. But they cannot keep her under lock and key forever. So murder is their only solution."

"That seems very clear."

"Now we will take another line of reasoning. When you follow two separate chains of thought, Watson, you will find some point of intersection which should approximate to the truth. We will start now, not from the lady but from the coffin and argue backward. That incident proves, I fear, beyond all doubt that the lady is dead. It points also to an orthodox burial with proper accompaniment of medical certificate and official sanction. Had the lady been obviously murdered, they would have buried her in a hole in the back garden. But here all is open and regular. What does that mean? Surely that they have done her to death in some way which has deceived the doctor and simulated a natural end – poisoning, perhaps. And yet how strange that they should ever let a doctor approach her unless he were a confederate, which is hardly a credible proposition."

"Could they have forged a medical certificate?"

"Dangerous, Watson, very dangerous. No, I hardly see them doing that. Pull up, cabby! This is evidently the undertaker's, for we have just passed the pawnbroker's. Would you go in, Watson? Your appearance inspires confidence. Ask what hour the Poultney Square funeral takes place tomorrow."

The woman in the shop answered me without hesitation that it was to be at eight o'clock in the morning. "You see, Watson, no mystery; everything aboveboard! In some way the legal forms have undoubtedly been complied with, and they think that they have little to fear. Well, there's nothing for it now but a direct frontal attack. Are you armed?"