Beresford stopped her with his hand uplifted.
"Just a moment, Miss Van Gorder.

Anderson ought to know of this." He started for the door without perceiving the flash of keen intelligence and alertness that had lit the Unknown's countenance for an instant, as once before, at the mention of the detective's name.
But just as he reached the door the detective entered.
He halted for a moment, staring at the strange figure of the Unknown.
"A new element in our mystery, Mr.Anderson," said Miss Cornelia, remembering that the detective might not have heard of the mysterious stranger before--as he had been locked in the billiard room when the latter had made his queer entrance.
The detective and the Unknown gazed at each other for a moment--the Unknown with his old expression of vacant stupidity.
"Quite dazed, poor fellow," Miss Cornelia went on.

Beresford added other words of explanation.
"He doesn't remember what happened to him.

Curious, isn't it ?" The detective still seemed puzzled.
"How did he get into the house ?" "He came through the terrace door some time ago," answered Miss Cornelia.

"Just before we were locked in." Her answer seemed to solve the problem to Anderson's satisfaction.
"Doesn't remember anything, eh ?" he said dryly.