“If what you say is really true, Carlier, our friends in Berlin would probably give you quite a handsome price for it,” replied the official thoughtfully.

He had watched the thief’s face, and knew that he was telling the truth.

“Will you have inquiries made?” urged the thief.

“Most certainly,” was the reply. “And if I find you have told the truth, I will endeavour to obtain some slight favour for you—a shorter sentence, perhaps.”

“I have told you the truth, m’sieur. It is surely the duty of every Frenchman, even though he be a thief like myself, to unmask a spy.”

“Most certainly,” declared the official. “And I am very glad indeed that you have told me. I shall make a report to the Prefect of Police this morning, and tell him the name of my informant. The matter will be dealt with at once by the political department of the Sûreté.”

“The Baron will not be told who informed against him?” asked Adolphe anxiously.

“Certainly not. But if Ralph Ansell is arrested, he will be charged with assisting foreign spies—a charge quite as serious as breaking into the Baron’s house.”

“He hated the Baron because the latter had discharged him from his secret service.”

“What were his duties?”