"Go ahead, old boy," thought Lupin, "cudgel your brains: you'll never spot it! Ah, if we had asked for Gilbert's pardon only, as Clarisse wished, you might have twigged the secret! But Vaucheray, that brute of a Vaucheray, there really could not be the least bond between Mme. Mergy and him.... Aha, by Jingo, it's my turn now!... He's watching me ... The inward soliloquy is turning upon myself... 'I wonder who that M. Nicole can be? Why has that little provincial usher devoted himself body and soul to Clarisse Mergy? Who is that old bore, if the truth were known? I made a mistake in not inquiring... I must look into this.... I must rip off the beggar's mask. For, after all, it's not natural that a man should take so much trouble about a matter in which he is not directly interested. Why should he also wish to save Gilbert and Vaucheray? Why? Why should he? ... " Lupin turned his head away. "Look out!... Look out!... There's a notion passing through that red-tape-merchant's skull: a confused notion which he can't put into words. Hang it all, he mustn't suspect suspect M. Lupin under M. Nicole! The thing's complicated enough as it is, in all conscience!...

But there was a welcome interruption. Prasville's secretary came to say that the audience would take place in an hour's time.

"Very well. Thank you," said Prasville. "That will do."

And, resuming the interview, with no further circumlocution, speaking like a man who means to put a thing through, he declared:

"I think that we shall be able to manage it. But, first of all, so that I may do what I have undertaken to do, I want more precise information, fuller details. Where was the paper?"

"In the crystal stopper, as we thought," said Mme. Mergy.

"And where was the crystal stopper?"

"In an object which Daubrecq came and fetched, a few days ago, from the writing-desk in his study in the Square Lamartine, an object which I took from him yesterday."

"What sort of object?"

"Simply a packet of tobacco, Maryland tobacco, which used to lie about on the desk."

Prasville was petrified. He muttered, guilelessly:

"Oh, if I had only known! I've had my hand on that packet of Maryland a dozen times! How stupid of me!"

"What does it matter?" said Clarisse. "The great thing is that the discovery is made."

Prasville pulled a face which implied that the discovery would have been much pleasanter if he himself had made it. Then he asked:

"So you have the list?"

"Yes."

"Yes."

"Show it to me."

And, when Clarisse hesitated, he added:

"Oh, please, don't be afraid! The list belongs to you, and I will give it back to you. But you must understand that I cannot take the step in question without making certain."

Clarisse consulted M. Nicole with a glance which did not escape Prasville. Then she said:

"Here it is."

He seized the scrap of paper with a certain excitement, examined it and almost immediately said:

"Yes, yes... the secretary's writing: I recognize it.... And the signature of the chairman of the company: the signature in red.... Besides, I have other proofs.... For instance, the torn piece which completes the left-hand top corner of this sheet..."

“I rather gathered that you had some idea of the sort in your head,” said he. “But why these personal attentions?”

“Because you have gone out of your way to annoy me. Because you have put your creatures upon my track.”

“My creatures! I assure you no!”

“Nonsense! I have had them followed. Two can play at that game, Holmes.”

“It is a small point, Count Sylvius, but perhaps you would kindly give me my prefix when you address me. You can understand that, with my routine of work, I should find myself on familiar terms with half the rogues’ gallery, and you will agree that exceptions are invidious.”

“Well, Mr. Holmes, then.”

“Excellent! But I assure you you are mistaken about my alleged agents.”

Count Sylvius laughed contemptuously.

“Other people can observe as well as you. Yesterday there was an old sporting man. To-day it was an elderly woman. They held me in view all day.”

“Really, sir, you compliment me. Old Baron Dowson said the night before he was hanged that in my case what the law had gained the stage had lost. And now you give my little impersonations your kindly praise?”

“It was you — you yourself?”

Holmes shrugged his shoulders. “You can see in the corner the parasol which you so politely handed to me in the Minories before you began to suspect.”

“If I had known, you might never —”

“Have seen this humble home again. I was well aware of it. We all have neglected opportunities to deplore. As it happens, you did not know, so here we are!”

The Count’s knotted brows gathered more heavily over his menacing eyes. “What you say only makes the matter worse. It was not your agents but your play-acting, busybody self! You admit that you have dogged me. Why?”

“Come now, Count. You used to shoot lions in Algeria.”

“Well?”

“But why?”

“Why? The sport — the excitement — the danger!”

“And, no doubt, to free the country from a pest?”

“Exactly!”

“My reasons in a nutshell!”

The Count sprang to his feet, and his hand involuntarily moved back to his hip-pocket.

“Sit down, sir, sit down! There was another, more practical, reason. I want that yellow diamond!”

Count Sylvius lay back in his chair with an evil smile.

“Upon my word!” said he.

“You knew that I was after you for that. The real reason why you are here to-night is to find out how much I know about the matter and how far my removal is absolutely essential. Well, I should say that, from your point of view, it is absolutely essential, for I know all about it, save only one thing, which you are about to tell me.”

“Oh, indeed! And pray, what is this missing fact?”

“Where the Crown diamond now is.”

The Count looked sharply at his companion. “Oh, you want to know that, do you? How the devil should I be able to tell you where it is?”