“What truth?” inquired Hugh quickly.

“Well—that she is a marque de ce.”

“A marque de ce—what is that?” asked Hugh eagerly.

“Ah! non, m’sieur. I must not tell you anything against her. You are her friend.”

“But I am endeavouring to find out something about her. To me she is a mystery.”

“No doubt. She is to everybody.”

“What did you mean by that expression?” he demanded. “Do tell me. I am very anxious to know your opinion of her, and something about her. I have a very earnest motive in trying to discover who and what she really is.”

“If I told you I should offend Il Passero,” replied the girl simply. “It is evident that he wishes you should remain in ignorance.”

“But surely, you can tell me in confidence? I will divulge nothing.”

“No,” answered the girl, whose face he could not see in the shadow. “I am sorry, M’sieur Brown”—she had not been told his Christian name—“but I am not permitted to tell you anything concerning Mademoiselle Yvonne.”