The detective, in spite of this assurance, lowered his voice.

“Whatever became of your sister, Mr. Lamont?”

There was a quick start, and the face of the millionaire got white.

“I never had a sister,” said he, with an effort.

“Make sure of that. Whatever became of her, I ask?”

Lamont looked around the room like a wild beast seeking a loophole of escape, but seeing none he came back to the detective.

“Pardon me for trying to deceive you,” said he. “That is the black spot on our family history. I had a sister once. But she is dead now.”

“Her name was——”

“Hester.”

“And you say she is dead?”