"I think," he said, "that I have at last got on the track of Montague Fallock."
Mr. Farrington looked at him with open mouth.
"You don't mean that?" he asked incredulously.
T. B. inclined his head.
"The open door below—the visitor?" jerked the stout man, "you don't think Montague Fallock was in the house to-night?"
T. B. nodded again, and there was a moment's silence.
"He has been blackmailing me," said Mr. Farrington, thoughtfully, "but I don't think——"
The detective turned up his coat collar preparatory to leaving.
"I have a rather unpleasant job," he said. "I shall have to search those unfortunate men."