“Why?”
“It would have told him that he was under suspicion. Best to have him off his guard.”
“You have other evidence to involve him?”
“Yes.”
“I thought so. What is it?”
“I told you about my quick, hurried secret visit to the office of the senior member of the firm?”
“Yes. What did you discover in there?”
“Not much, and yet a good deal. There was a mirror so fixed near the ceiling that a person standing or sitting near the connecting door could see reflected everything which[{40}] went on in the other room where the tragedy occurred.”
“And, as the transom above the door was open, could hear as well?”
“Yes.”