“Ah, really!”

There was no mistaking the commissary’s tone; a suspicion, the first, had evidently entered his mind.

The banker understood it; he started, and said, quickly:

“I met the demand, but at the cost of a disagreeable sacrifice. I ought to add further that, if my orders had been obeyed, the three hundred and fifty thousand francs would not have been in.”

“How is that?”

“I never desire to have large sums of money in my house over-night. My cashier had positive orders to wait always until the last moment before drawing money from the Bank of France. I above all forbade him to leave money in the safe over-night.”

“You hear this?” said the commissary to Prosper.

“Yes, monsieur,” replied the cashier, “M. Fauvel’s statement is quite correct.”

After this explanation, the suspicions of the commissary, instead of being strengthened, were dissipated.

“Well,” he said, “a robbery has been perpetrated, but by whom? Did the robber enter from without?”