“Of course, patron, but must I let him know that I suspect anyone besides the banker or cashier?”

“Certainly. Justice must not be kept in ignorance of your intention of following up this affair. M. Patrigent will tell you to watch Prosper; you will reply that you will not lose sight of him. I myself will answer for his being in safe-keeping.”

“Suppose he asks me about Gypsy?”

M. Lecoq hesitated for a moment.

“Tell him,” he finally said, “that you persuaded her, in the interest of Prosper, to live in a house where she can watch someone whom you suspect.”

Fanferlot was joyously picking up his hat to go, when M. Lecoq checked him by waving his hand, and said:

“I have not finished. Do you know how to drive a carriage and manage horses?”

“Why, patron, can you ask this of a man who used to be a rider in the Bouthor Circus?”

“Very well. As soon as the judge dismisses you, return home immediately, make yourself a wig and the complete dress of a valet; and, having dressed yourself, take this letter to the Agency on Delorme Street.”

“But, patron—”