"Were you looking out for it then?" riposted the Procureur. But no sooner were the words out of his mouth than he realised his mistake. The Man in Grey made no reply; he literally appeared to withdraw himself into an invisible shell, to efface himself yet further within a colourless atmosphere, out of which it was obviously unwise to try to drag him. M. le Procureur pressed his thin lips together, impatient with himself at an unnecessary loss of dignity. As usual M. le préfet was ready to throw himself into the breach.
"I am sure," he said with his usual volubility, "that we are wasting Monsieur le Procureur's valuable time now. I can assure you, Monsieur—er—Fernand, that our chief commissary of police can give you all the details of the crime—if, indeed, they interest you. Shall we go now?—that is," he added, with that same feeling of hesitation which overcame him every time he encountered the secret agent's calm, inquiring look, "that is—er—unless there's anything else you wish to ask of Monsieur le Procureur."
"I wish to know with regard to the murder, what was the cause of death," said the Man in Grey quietly.
"A pistol shot, sir," replied M. de Saint-Tropèze coldly, "right between the shoulder blades, delivered at short range apparently, seeing that the man's coat was charred and blackened with powder. The leech avers that he must have fallen instantly."
"Shot between the shoulders, and yet found lying on his back," murmured the Man in Grey. "And was nothing at all found upon the body that would give a clue to the motive of the crime?"
"Nothing, my dear sir," broke in the préfet glibly, "nothing at all. In his breeches' pocket there was a greasy and crumpled sheet of letter-paper, which on examination was found to be covered with a row of numerals all at random—like a child's exercise-book."
"Could I see the paper?"
"It is at the commissariat of police," explained the Procureur curtly.
"Where I can easily find it, of course," concluded the Man in Grey with calm decision. "In the meanwhile perhaps Monsieur le préfet will be kind enough to tell me something more about the burglary at the Archbishop's Palace."
"There's very little to tell, my good Monsieur Fernand," said M. Vimars, who, far more conscious than was the stranger of the Procureur's growing impatience, would have given a month's salary for the privilege of making himself scarce.