She turned toward him with a little cry of alarm.

“Jean!” she cried. “What are you doing here? Who admitted you? What does it mean?”

Tarzan was thunderstruck, but in an instant he realized a part of the truth.

“Then you did not send for me, Olga?”

“Send for you at this time of night? Mon Dieu! Jean, do you think that I am quite mad?”

“François telephoned me to come at once; that you were in trouble and wanted me.”

“François? Who in the world is François?”

“He said that he was in your service. He spoke as though I should recall the fact.”

“There is no one by that name in my employ. Some one has played a joke upon you, Jean,” and Olga laughed.

“I fear that it may be a most sinister ‘joke,’ Olga,” he replied. “There is more back of it than humor.”