"And that does not tell us where Farrell went that day," said Quarles. "It seems strange that he did not meet any of the scores of people who knew him as he left the office that afternoon."
"Undoubtedly he did meet many."
"They didn't come forward to say they had seen him."
"I can see no reason why they should do so. There was no question of fixing the time he left. I was able to give definite information on that point."
"Well, we seem to have used up our facts," said Quarles, "and are forced to theorize."
Delverton smiled.
"You must not jump to the conclusion that I have failed," said the professor quickly. "I did not promise to tell you the name of the murderer to-night. Let me theorize for a few moments. You told me you believed that Farrell's tragic end had hastened your brother's death. Did your brother chance to come to the office that day?"
"No."
"Perhaps he came that night after you had left. I suppose you cannot bring evidence that he did not?"
"No; but—"