“This is an old friend,” said I to Dodd. “It is possible that his presence may be entirely unnecessary, and, on the other hand, it may be essential. It is not necessary at the present stage to go further into the matter.”

The narratives of Watson have accustomed the reader, no doubt, to the fact that I do not waste words or disclose my thoughts while a case is actually under consideration. Dodd seemed surprised, but nothing more was said, and the three of us continued our journey together. In the train I asked Dodd one more question which I wished our companion to hear.

“You say that you saw your friend’s face quite clearly at the window, so clearly that you are sure of his identity?”

“I have no doubt about it whatever. His nose was pressed against the glass. The lamplight shone full upon him.”

“It could not have been someone resembling him?”

“No, no, it was he.”

“But you say he was changed?”

“Only in colour. His face was — how shall I describe it? — it was of a fish-belly whiteness. It was bleached.”

“Was it equally pale all over?”

“I think not. It was his brow which I saw so clearly as it was pressed against the window.”

“Did you call to him?”

“I was too too startled and horrified for the moment. Then I pursued him, as I have told you, but without result.”

My case was practically complete, and there was only one small incident needed to round it off. When, after a considerable drive, we arrived at the strange old rambling house which my client had described, it was Ralph, the elderly butler, who opened the door. I had requisitioned the carriage for the day and had asked my elderly friend to remain within it unless we should summon him. Ralph, a little wrinkled old fellow, was in the conventional costume of black coat and pepper-and-salt trousers, with only one curious variant. He wore brown leather gloves, which at sight of us he instantly shuffled off, laying them down on the hall-table as we passed in. I have, as my friend Watson may have remarked, an abnormally acute set of senses, and a faint but incisive scent was apparent. It seemed to centre on the hall table. I turned, placed my hat there, knocked it off, stooped to pick it up, and contrived to bring my nose within a foot of the gloves. Yes, it was undoubtedly from them that the curious tarry odour was oozing. I passed on into the study with my case complete. Alas, that I should have to show my hand so when I tell my own story! It was by concealing such links in the chain that Watson was enabled to produce his meretricious finales.

Colonel Emsworth was not in his room, but he came quickly enough on receipt of Ralph’s message. We heard his quick, heavy step in the passage. The door was flung open and he rushed in with bristling beard and twisted features, as terrible an old man as ever I have seen. He held our cards in his hand, and he tore them up and stamped on the fragments.

"Don't you think, monsieur le secretaire-general, that this broken bit of ivory which was picked up on the ground... "

"No, M. Nicole, no. That bit of ivory belongs to something which we do not know and which its owner will at once make it his business to conceal. In order to trace the owner, we should at least be able to define the nature of the thing itself."

M. Nicole reflected and then began:

"Monsieur le secretaire-general, when Napoleon I fell from power... "

"Oh, M. Nicole, oh, a lesson in French history!"

"Only a sentence, monsieur le secretaire-general, just one sentence which I will ask your leave to complete. When Napoleon I fell from power, the Restoration placed a certain number of officers on half-pay. These officers were suspected by the authorities and kept under observation by the police. They remained faithful to the emperor's memory; and they contrived to reproduce the features of their idol on all sorts of objects of everyday use; snuff-boxes, rings, breast-pins, pen-knives and so on."

"Well?"

"Well, this bit comes from a walking-stick, or rather a sort of loaded cane, or life-preserver, the knob of which is formed of a piece of carved ivory. When you look at the knob in a certain way, you end by seeing that the outline represents the profile of the Little Corporal. hat you have in your hand, monsieur le secretaire-general, is a bit of the ivory knob at the top of a half-pay officer's life-preserver."

"Yes," said Prasville, examining the exhibit, "yes, I can make out a profile... but I don't see the inference... "

"The inference is very simple. Among Daubrecq's victims, among those whose names are inscribed on the famous list, is the descendant of a Corsican family in Napoleon's service, which derived its wealth and title from the emperor and was afterward ruined under the Restoration. It is ten to one that this descendant, who was the leader of the Bonapartist party a few years ago, was the fifth person hiding in the motor-car. Need I state his name?"

"The Marquis d'Albufex?" said Prasville.

"The Marquis d'Albufex," said M. Nicole.

M. Nicole, who no longer seemed in the least worried with his hat, his glove and his umbrella, rose and said to Prasville:

"Monsieur le secretaire-general, I might have kept my discovery to myself, and not told you of it until after the final victory, that is, after bringing you the list of the Twenty-seven. But matters are urgent. Daubrecq's disappearance, contrary to what his kidnappers expect, may hasten on the catastrophe which you wish to avert. We must therefore act with all speed. Monsieur le secretaire-general, I ask for your immediate and practical assistance."

"In what way can I help you?" asked Prasville, who was beginning to be impressed by his quaint visitor.

"By giving me, to-morrow, those particulars about the Marquis d'Albufex which it would take me personally several days to collect."

Prasville seemed to hesitate and turned his head toward Mme. Mergy. Clarisse said:

"I beg of you to accept M. Nicole's services. He is an invaluable and devoted ally. I will answer for him as I would for myself."