Oh! he must be sure that no doubts, no pusillanimity on the part of any official would be allowed to stand in the way of the consummation of all his most cherished dreams. Papers or no papers, testimony or no testimony, the incarcerated Paul Molé was the Scarlet Pimpernel - of this Chauvelin was as certain as that he was alive. His every sense had testified to it when he stood in the narrow room of the Rue des Cordeliers, face to face - eyes gazing into eyes - with his sworn enemy.

Unluckily, however, he found the Public Prosecutor in a surly and obstinate mood, following on an interview which he had just had with citizen Commissary Cuisinier on the matter of the prisoner Paul Molé.

"His papers are all in order, I tell you," he said impatiently, in answer to Chauvelin's insistence. "It is as much as my head is worth to demand a summary execution."

"But I tell you that those papers of his are forged," urged Chauvelin forcefully.

"They are not," retorted the other. "The Commissary swears to his own signature on the identity book. The concierge at the Abbaye wears that he knows Molé, so do all the men of the Sûreté who have seen him. The Commissary was known him as an indigent, good-for-nothing lubbard who has begged his way in the streets of Paris every since he was released from gaol some months ago, after he had served a term for larceny. Even your own man Hébert admits to feeling doubtful on the point. You have had the nightmare, citizen," concluded Fouquier-Tinville with a harsh laugh.

"But, name of a dog!" broke in Chauvelin savagely. "You are not proposing to let the man go?"

"What else can I do?" the other rejoined fretfully. "We shall get into terrible trouble if we interfere with a man like Paul Molé. You know yourself how it is these days. We should have the whole of the rabble of Paris clamouring for our blood. If, after we have guillotined him, he is proved to be a good patriot, it will be my turn next. No! I thank you!"

"I tell you man," retorted Chauvelin desperately, "that the man is not Paul Molé - that he is the English spy whom we all know as the Scarlet Pimpernel."

"Eh bien!" riposted Fouquier-Tinville. "Bring me more tangible proof that our prisoner is not Paul Molé and I'll deal with him quickly enough, never fear. But if by to-morrow morning you do not satisfy me on the point... I must let him go his way."

A savage oath rose to Chauvelin's lips. He felt like a man who has been running, panting to reach a goal, who sees that goal within easy distance of him, and is then suddenly captured, caught in invisible meshes which hold him tightly, and against which he is powerless to struggle. For the moment he hated Fouquier-Tinville with a deadly hatred, would have tortured and threatened him until he wrung a consent, an admission, out of him.

Name of a name! when that damnable English spy was actually in his power, the man was a pusillanimous fool to allow the rich prize to slip from his grasp! Chauvelin felt as if he were choking; his slender fingers worked nervily around his cravat; beads of perspiration trickled unheeded down his pallid forehead.

Then suddenly he had an inspiration - nothing less! It almost seemed as if Satan, his friend, had whispered insinuating words into his ear. That scrap of paper! He had thrust it awhile ago into the breast pocket of his coat. It was still there, and the Public Prosecutor wanted a tangible proof... Then, why not...?

Slowly, his thoughts still in the process of gradual co-ordination, Chauvelin drew that soiled scrap of paper out of his pocket. Fouquier-Tinville, surly and ill-humoured, had his back half-turned towards him, was moodily picking at his teeth. Chauvelin had all the leisure which he required. He smoothed out the creases in the paper and spread it out carefully upon the desk close to the other man's elbow. Fouquier-Tinville looking down on it, over his shoulder.

"What is that?" he queried.

"As you see, citizen," was Chauvelin's bland reply. "A message, such as yourself have oft received, methinks, from our mutual enemy, the Scarlet Pimpernel."

But already the Public Prosecutor had seized upon the paper, and of a truth Chauvelin had no longer cause to complain of his colleague's indifference. That doggerel rhyme, no less than the signature, had the power to rouse Fouquier-Tinville's ire, as it had that of disturbing Chauvelin's well-studied calm.

"What is it?" reiterated the Public Prosecutor, white now to the lips.

"I have told you, citizen," rejoined Chauvelin imperturbably. "A message from that English spy. It is also the proof which you have demanded of me - the tangible proof that the prisoner, Paul Molé, is none other than the Scarlet Pimpernel."

"But," ejaculated the other hoarsely, "where did you get this?"

"It was found in the cell which Paul Molé occupied in the dépôt of the Rue de Tourraine, where he was first incarcerated. I picked it up there after he was removed... the ink was scarcely dry upon it."

The lie came quite glibly to Chauvelin's tongue. Was not every method good, every device allowable, which would lead to so glorious an end?

"Why did you not tell me of this before?" queried Fouquier-Tinville, with a sudden gleam of suspicion in his deep-set eyes.

"You had not asked me for a tangible proof before," replied Chauvelin blandly. "I myself was so firmly convinced of what I averred that I had well-nigh forgotten the existence of this damning scrap of paper."

Damning indeed! Fouquier-Tinville had seen such scraps of paper before. He had learnt the doggerel rhyme by heart, even though the English tongue was quite unfamiliar to him. He loathed the English - the entire nation - with all that deadly hatred which a divergence of political aims will arouse in times of acute crises. He hated the English government, Pitt and Burke and even Fox, the happy-go-lucky apologist of the young Revolution. But, above all, he hated that League of English spies - as he was pleased to call them - whose courage, resourcefulness, as well as reckless daring, had more than once baffled his own hideous schemes of murder, of pillage, and of rape.

Thank Beelzebub and his horde of evil spirits, citizen Chauvelin had been clear-sighted enough to detect that elusive Pimpernel under the disguise of Paul Molé.

"You have deserved well of your country," said Tinville with lusty fevour, and gave Chauvelin a vigorous slap on the shoulder. "But for you I should have allowed that abominable spy to slip through our fingers."

"I have succeeded in convincing you, citizen?" Chauvelin retorted dryly.

"Absolutely!" rejoined the other. "You may now leave the matter to me. And 'twill be friend Molé who will be surprised to-morrow," he added with a harsh guffaw, "when he finds himself face to face with me, before a Court of Justice."

He was all eagerness, of course. Such a triumph for him! The indictment of the notorious Scarlet Pimpernel on a charge of espionage would be the crowning glory of his career! Let other men look to their laurels! Those who brought that dangerous enemy of revolution to the guillotine would for ever be proclaimed as the saviours of France.

"A short indictment," he said, when Chauvelin, after a lengthy discussion on various points, finally rose to take his leave, "but a scathing one! I tell you, citizen Chauvelin, that to-morrow you will be the first to congratulate me on an unprecedented triumph."

He had been arguing in favour of a sensational trial and no less sensational execution. Chauvelin, with his memory harking back on many mysterious abductions at the very foot of the guillotine, would have liked to see his elusive enemy quietly put to death amongst a batch of traitors, who would help to mask his personality until after the guillotine had fallen, when the whole of Paris should ring with the triumph of this final punishment of the hated spy.