“I am all ears,” said Patrice, who was burning to know more.

“Well, the motive force of the plot was here, in this house. Essarès Bey, president of the Franco-Oriental Bank, 6, Rue Lafayette, apparently an Egyptian, in reality a Turk, enjoyed the greatest influence in the Paris financial world. He had been naturalized an Englishman, but had kept up secret relations with the former possessors of Egypt; and he had received instructions from a foreign power, which I am not yet able to name with certainty, to bleed—there is no other word for it—to bleed France of all the gold that he could cause to flow into his coffers. According to documents which I have seen, he succeeded in exporting in this way some seven hundred million francs in two years. A last consignment was preparing when war was declared. You can understand that thenceforth such important sums could not be smuggled out of the country so easily as in times of peace. The railway-wagons are inspected on the frontiers; the outgoing vessels are searched in the harbors. In short, the gold was not sent away. Those two hundred and fifty or three hundred millions remained in France. Ten months passed; and the inevitable happened, which was that Essarès Bey, having this fabulous treasure at his disposal, clung to it, came gradually to look upon it as his own and, in the end, resolved to appropriate it. Only there were accomplices. . . .”

“The men I saw last night?”

“Yes, half-a-dozen shady Levantines, sham naturalized French citizens, more or less well-disguised Bulgarians, secret agents of the little German courts in the Balkans. This gang ran provincial branches of Essarès’ bank. It had in its pay, on Essarès’ account, hundreds of minor agents, who scoured the villages, visited the fairs, were hail-fellow-well-met with the peasants, offered them bank-notes and government securities in exchange for French gold and trousered all their savings. When war broke out the gang shut up shop and gathered round Essarès Bey, who also had closed his offices in the Rue Lafayette.”

“What happened then?”

“Things that we don’t know. No doubt the accomplices learnt from their governments that the last despatch of gold had never taken place; and no doubt they also guessed that Essarès Bey was trying to keep for himself the three hundred millions collected by the gang. One thing is certain, that a struggle began between the former partners, a fierce, implacable struggle, the accomplices wanting their share of the plunder, while Essarès Bey was resolved to part with none of it and pretended that the millions had left the country. Yesterday the struggle attained its culminating-point. In the afternoon the accomplices tried to get hold of Mme. Essarès so that they might have a hostage to use against her husband. In the evening . . . in the evening you yourself witnessed the final episode.”

“But why yesterday evening rather than another?”

“Because the accomplices had every reason to think that the millions were intended to disappear yesterday evening. Though they did not know the methods employed by Essarès Bey when he made his last remittances, they believed that each of the remittances, or rather each removal of the sacks, was preceded by a signal.”

“Yes, a shower of sparks, was it not?”

“Exactly. In a corner of the garden are some old conservatories, above which stands the furnace that used to heat them. This grimy furnace, full of soot and rubbish, sends forth, when you light it, flakes of fire and sparks which are seen at a distance and serve as an intimation. Essarès Bey lit it last night himself. The accomplices at once took alarm and came prepared to go any lengths.”