The woman hesitated.
“I don’t know—I don’t think so.”
“Is there any way you can see through the front door who is outside, without opening it?”
“No, sir. Sometimes I wished there was.”
“Then, if the person knocked on the window, Mr. Benson must have recognized the voice?”
“It looks that way, sir.”
“And you’re certain no one could have got in without a key?”
“How could they? The door locks by itself.”
“It’s the regulation spring-lock, isn’t it?”
“Yes, sir.”