“Well—how can I conjecture otherwise? The Doctor would never have left suddenly without sending word to me. Have you written to Charlie telling him of the sudden disappearance?”

“Yes. I wrote the same day that you told me, and addressed the letter to the Grand Hotel, at Belgrade.”

“Then he has it by now?”

“Certainly. I’m expecting a wire from him asking for further particulars. He should have got my letter the day before yesterday, but up to the present I’ve received no acknowledgment.”

Max did not tell her that her brother had not left London on the night when he was believed to have done so, and that it was more than probable he had never started from Charing Cross. He kept his own counsel, at the same time wondering what was the real reason why Marion so steadfastly refused to tell him the nature of Maud’s confession. That it had been of a startling nature she had already admitted, therefore he could only suppose that it had some direct connection with the astounding disappearance of both father and daughter.

On the other hand, however, he was suspicious of some ingenious plot, because he felt convinced that the Doctor would never have effaced himself without giving him confidential news of his whereabouts.

“Have you written to Maud?” he asked, after a fen; moments.

“No. I don’t know her address.”

“And you have not seen her?”

“No.”