That argument was certainly unanswerable. But Tournefort was out of temper. He roughly ordered Grosjean to bring the lamp and show him the back staircase and the disused door. The concierge obeyed without a murmur. He was not in the least disturbed or frightened by all this blustering. He was only afraid that getting our of bed had made his cold worse. But he knew Tournefort of old. A good fellow, but inclined to be noisy and arrogant since he was in the employ of the Government. Grosjean took the precaution of putting on his trousers and wrapping an old shawl round his shoulders. Then he had a final sip of hot coffee; after which he picked up the lamp and guided Tournefort out of the lodge.

The wind had quite gone down by now. The lamp scarcely flickered as Grosjean held it upon his head.

"Just here, citizen Tournefort," he said, and turned sharply to his left. But the next sound which he uttered was a loud croak of astonishment.

"That door has been out of use ever since I've been here," he muttered.

"And it certainly was closed when I stood up against it," rejoined Tournefort, with a savage oath, "or, of course, I should have noticed it."

Close to the lodge, at right angles to it, a door stood partially open. Tournefort went through it, closely followed by Grosjean. He found himself in a passage which ended in a cul de sac on his right; on the left was the foot of the stairs. The whole place was pitch dark save for the feeble light of the lamp. The cul de sac itself reeked of dirt and fustiness, as if it had not been cleaned or ventilated for years.

"When did you last notice that this door was closed?" queried Tournefort, furious with the sense of discomfiture, which he would have liked to vent on the unfortunate concierge.

"I have not noticed it for some days, citizen," replied Grosjean meekly. "I have had a severe cold, and have not been outside my lodge since Monday last. But we'll ask Amélie!" he added more hopefully.

Amélie, however, could throw no light upon the subject. She certainly kept the back stairs cleaned and swept, but it was not part of her duties to extend her sweeping operations as far as the cul de sac. She had quite enough to do as it was, with grandfather now practically helpless. This morning, when she went out to do her shopping, she had not noticed whether the disused door did or did not look the same as usual.

Grosjean was very sorry for his friend Tournefort, who appeared vastly upset, but still more sorry for himself, for he knew what endless trouble this would entail upon him.

Nor was the trouble slow in coming, not only on Grosjean, but on ever lodger inside the house; for before half an hour had gone by Tournefort had gone and come back, this time with the local commissary of police and a couple of agents, who had every man, woman and child in that house out of bed and examined at great length, their identity books searchingly overhauled, their rooms turned topsy-turvy and their furniture knocked about.

It was past midnight before all these perquisitions were completed. No one dared to complain at these indignities put upon peaceable citizens on the mere denunciation of an obscure police agent. These were times when every regulation, every command, had to be accepted without a murmur. At one o'clock in the morning, Grosjean himself was thankful to get back to bed, having satisfied the commissary that he was not a dangerous conspirator.

But of anyone even remotely approaching the description of the ci-devant Comtesse de Sucy, or of any man called Bertin, there was not the faintest trace.

Chapter II:

But no feeling of discomfort ever lasted very long with citizen Tournefort. He was a person of vast resource and great buoyancy of temperament.

True, he had not apprehended two exceedingly noxious aristos, as he had hoped to do; but he held the threads of an abominable conspiracy in his hands, and the question of catching both Bertin and Madame la Comtesse red-handed was only a question of time. But little time had been lost. There was always someone to be found at the offices of the Committee of Public Safety, which were open all night. It was possible that citizen Chauvelin would be still there, for he often took on the night shift, or else citizen Gourdon.

It was Gourdon who greeted his subordinate, someone ill-humouredly, for he was indulging in a little sleep, with his toes turned to the fire, as the night was so damp and cold. But when he heard Tournefort's story, he was all eagerness and zeal.

"It is, of course, too late to do anything now," he said finally, after he had mastered every detail of the man's adventures in the Ruelle du Paradis! "but get together half a dozen men upon whom you can rely, and by six o'clock in the morning, or even five, we'll be on our way to Gentilly. Citizen Chauvelin was only saying to-day that he strongly suspected the ci-devant Comtesse de Sucy of having left the bulk of her valuable jewellery at the château, and that she would make some effort to get possession of it. It would be rather fine, citizen Tournefort," he added with a chuckle, "if you and I could steal a march on citizen Chauvelin over this affair, what? He has been extraordinarily arrogant of late and marvellously in favour not only with the Committee, but with citizen Robespierre himself."

"They say," commented Tournefort, "that he succeeded in getting hold of some papers which were of great value to the members of the Committee."

"He never succeeded in getting hold of that meddlesome Englishman whom they call the Scarlet Pimpernel," was Gourdon's final dry comment.

Thus the matter decided on. And the following morning at daybreak, Gourdon, who was only a subordinate officer on the Committee of Public Safety, took it upon himself to institute a perquisition in the château of Gentilly, which is situated close to the commune of that name. He was accompanied by his friend Tournefort and a gang of half a dozen ruffians recruited from the most disreputable cabarets of Paris.

The invention had been to steal a march on citizen Chauvelin, who had been over-arrogant of late; but the result did not come up to expectations. By midday the château had been ransacked from attic to cellar; every kind of valuable property had been destroyed, priceless works of art irretrievably damaged. But priceless works of art had no market in Paris these days; and the property of real value - the Sucy diamonds, namely - which had excited the cupidity or the patriotic wrath of citizens Gourdon and Tournefort could nowhere be found.

To make the situation more deplorable still, the Committee of Public Safety had in some unexplainable way got wind of the affair, and the two worthies had the mortification of seeing citizen Chauvelin presently appear upon the scene.

It was then two o'clock in the afternoon. Gourdon, after he had snatched a hasty dinner at a neighbouring cabaret, had returned to the task of pulling the château of Gentilly about his own ears if need be, with a view to finding the concealed treasure.

For the nonce he was standing in the centre of the finely proportioned hall. The rich ormolu and crystal chandelier lay in a tangled, broken heap of scraps at his feet, and all around there was a confused medley of pictures, statuettes, silver ornaments, tapestry and brocade hangings, all piled up in disorder, smashed, tattered, kicked at now and again by Gourdon, to the accompaniment of a savage oath.

The house itself was full of noises; heavy footsteps tramping up and down the stairs, furniture turned over, curtains torn from their poles, doors and windows battered in. And through it all the ceaseless hammering of pick and axe, attacking these stately walls which had withstood the wars and sieges of centuries.