“N-n-no. I did not see your face; but it could have been nobody else whom I saw.”
“You think so? We will see, for I understand now exactly how you have made an awful mistake. Was it on the couch in your brother’s room where you think you saw me? No, let me put the question differently: When you were looking into that room through the half-open door, and saw the terrible scene you have just described, were you conscious that there was a person—a third person in that room?”
“Yes.”
“And where was that third person?”
“Stretched upon the couch, apparently sleeping.”
“And when you saw me in the garden with your brother a little while ago, you naturally supposed that I was the same person you had seen asleep on the couch in your brother’s room? Is that it?”
“Yes; but there is also another reason.”
“I know that there were three persons who came into the house some time after midnight, and I know that those three persons went to my brother’s rooms.”
“Excellent. Now we are getting at it. How did you know that?”