"Which might be fatal?" inquired Paul.

"No, but which might affect her brain."

"I do not think so. Pardon my contradicting you, professor, but I have a very strong impression that my mother is not in the least insane, and that I may succeed in bringing her to look at this dreadful business in its true light."

"I fear not," answered Dr. Cutter sadly.

"But you do not know," insisted Paul. "Unless you are perfectly sure that my mother is really mad, you can have no right to prevent my seeing her. I may possibly persuade her. I am the only one left," he added bitterly, "and I must be a son to her in fact as well as in relation. I cannot, for my own sake, let her go to our English relatives, with this story to tell, without at least contradicting it."

"It is of no use to contradict it to her."

"Of no use!" exclaimed Paul, impatiently. "Do you think that if the slightest suspicion, however unfounded, had rested on me, my chief would have allowed me to leave Constantinople without clearing it up? I should think that anybody in his senses would see that!"

"Yes,—anybody in his or her senses," answered the professor coldly.

Paul stopped in his walk, and faced the strong man with the gold spectacles and the intelligent features who had thus obstinately thrust himself in his path.

"Sir," he said, "I know you very slightly, and I do not want to insult you. But if you continue to oppose me, I shall begin to think that you have some other object in view besides a concern for my mother's health." His drawn and haggard features wore an expression of desperate determination as he spoke, and his cold blue eyes began to brighten dangerously.