“Patron,” he ventured to say, “you seem to take a great interest in this affair, you have so deeply studied it.”

M. Lecoq started nervously, and replied, frowning:

“You are too curious, Master Squirrel; be careful that you do not go too far. Do you understand?”

Fanferlot began to apologize.

“That will do,” interrupted M. Lecoq. “If I choose to lend you a helping hand, it is because it suits my fancy to do so. It pleases me to be the head, and let you be the hand. Unassisted, with your preconceived ideas, you never would have found the culprit; if we two together don’t find him, my name is not Lecoq.”

“We shall certainly succeed if you interest yourself in the case.”

“Yes, I am interested in it, and during the last four days I have discovered many important facts. But listen to me. I have reasons for not appearing in this affair. No matter what happens, I forbid your mentioning my name. If we succeed, all the success must be attributed to you. And, above all, don’t try to find out what I choose to keep from you. Be satisfied with what explanations I give you. Now, be careful.”

These conditions seemed quite to suit Fanferlot.

“I will obey your instructions, and be discreet.”

“I shall rely upon you. Now, to begin, you must carry this photograph to the judge of instruction. I know M. Patrigent is much perplexed about this case. Explain to him, as if it were your own discovery, what I have just shown you; repeat for his benefit the scene we have acted, and I am convinced that this evidence will determine him to release the cashier. Prosper must be at liberty before I can commence my operations.”