The big, bearded man regained his calmness, and spoke in slow, measured tones. “I have seen your portrait in the newspapers, Signor, and so was able to give a name to my preserver. It is in my power to put you in possession of an important secret that will bring great distinction to you, when you impart it to the proper quarters. In return you will secure for me a full pardon. I am not asking too exorbitant a price; I am sure you will admit that.”

“It is a secret, I can guess, concerning the man whom you describe as our common enemy, Prince Boris Zouroff.”

Ivan nodded his big head. “Listen! I have many friends in St. Petersburg, most of them certainly not of a reputable class. But I have one friend, quite a decent and honest fellow, born like myself on the Prince’s estates. His name is Stepan, and he is in the service of the well-known opera-singer, popularly known as La Belle Quéro.”

Corsini started. At first he had felt inclined to pay little heed to the outlaw’s rather wild talk. How could a man in his position be of any serious use, a man who had to skulk in obscure corners, lest he drew upon himself the too vigilant attention of the police?

“Stepan and I were boys together and great comrades. The poor fellow is heavily handicapped in the fact that he is very deaf. At times he can hear a little, but his hearing is never to be depended on. He was rather a favourite of Zouroff’s, who, I suppose, found him useful in certain ways, perhaps because of his infirmity: what he could not hear he could not communicate to others.”

“I quite understand,” interposed the young Italian.

“Some considerable time ago, Zouroff brought him up from the country and installed him in the service of Madame Quéro. Of course he had a motive in this, which you will presently comprehend. I must explain to you that owing to his deafness being so acute, all those who want to speak to him have to use signs. All the same, he is a very intelligent fellow, and can see through a brick wall as clearly as anybody. His speech is affected, too.”

“For what purpose did his master hand him over to Madame Quéro?” queried Corsini.

“I will explain, Signor. The singer has constantly at her house parties of men; no other woman but herself appears at them; and these parties consist of Zouroff and his friends. I have made it my business to find out all their names. You can have that list when you want it; it will be useful to certain persons in high quarters.”