"And, of course, they have not been found."
"No. She made a pretty careful search before phoning."
"Fancy that. But she might have saved herself the trouble.—What does the doughty Sergeant opine?"
"Heath reached the house before ten o'clock, and made an investigation. But he learned nothing. No one admitted hearing any sound in the hall during the night. He re-searched the house himself, but without result."
"Have you heard from Von Blon this morning?"
"No; but Heath saw him. He came to the house about ten and stayed nearly an hour. He appeared very much upset over the stolen drugs, and immediately asked if any trace of them had been found. He spent most of the hour with Sibella."
"Ah, welladay! Let us enjoy our truffes gastronome without the intrusion of unpleasant speculations. This Madeira sauce, by the by, is very good." Thus Vance dismissed the subject.
However, that luncheon was to prove a memorable one; for toward the end of the meal Vance made a suggestion—or, rather, insisted upon an action—that was eventually to solve and explain the terrible tragedies at the Greene mansion. We had reached our dessert when, after a long silence, he looked up at Markham and said:
"The Pandora complex has seized and mastered me. I simply must get into Tobias's locked library. That sacred adytum has begun to infest my slumbers; and ever since you mentioned the legacy of those books I've had no rest. I yearn to become ac-
