“Then his mind is greatly at fault this minute. Let me ask another question.”

“Not another one! He has been questioned enough. Don’t you see you have excited him?”

“Not so much but that he can answer intelligently. Perry Lamont, your sister did not die heirless.”

“My God!”

“She left some of her blood behind. She did not pass out of the world at the hand of the assassin without leaving behind some one who has a right to her name!”

The look of the millionaire became a stare, and his hand shook as he laid it upon the desk before him.

“Come!” cried Opal. “Must we really buy your silence?”

“It is not in the market, miss, as I have once told you. I want to reach the solution of this terrible crime. I shall not turn from the trail till I am at the end of it. Mother Flintstone’s blood calls for revenge, and——”

Opal, who stood beside her father, leaned over him and whispered in his ear.

The old man’s face brightened.