Beside the fire, while the detective, a crafty, keen-eyed Neapolitan, smoked cigarettes, the diplomat explained that he required strict inquiry made into the antecedents of the corporal, Tonini. He also desired information concerning the private lives of General Cataldi, his secretary, Pironti, and the official, Lambarini.

The detective made some careful memoranda in his pocket-book and promised most minute attention to the matter.

“Remember, Signor Pucci,” Waldron said, “this affair is strictly confidential and concerns His Majesty alone. I shall tell him that I have entrusted the inquiry to you.”

“I will do my very utmost, signore, and place in your hands all the information I can gather. You wish for a written report?”

“Certainly. And only actual facts.”

The detective showed greatest curiosity regarding the reason of such inquiries regarding public officials, but the Englishman told him nothing.

“Just make your inquiries, Signor Pucci,” he said, “this is all I require of you at present. I may be absent from Rome for a week, so while I am away please continue to work. As you know, the Questore has placed your services entirely at His Majesty’s disposal.”

“I appreciate the honour which has been done me,” was the astute officer’s reply, for he was a brigadier, and a terror to the criminal fraternity in the Eternal City. Having graduated in the underworld of Naples among the Camorra and the Mafia, he had become one of the Questore’s right-hand men. “His Majesty knows me,” he added, “for I have done duty with him many times on his journeys. I am often told off as his personal guardian.”

“In that case then I can rely upon you to treat this matter with the utmost confidence,” Hubert remarked, and soon afterwards Peters showed the tall man out.

Time after time Hubert examined the mysterious letter with which Her Highness had entrusted him. Why was Pujalet passing in Brussels as a Servian? What secret could that sealed envelope contain which could not be trusted to the post? Ah! if he could only discover it!