"Did your father accompany you to the street door?"
"I do not think he did."
"Cannot you say with certainty?"
"No. I regret that, as regards the last few minutes of the interview, I cannot entirely depend upon my memory. I was deeply agitated, and my mind was in confusion. I have endeavoured in vain to recall every incident and word, and it has occurred to me that the fever from which I immediately afterwards suffered, and which kept me to my bed for several days, may have been upon me then. I have a recollection--not very clear--that as I went downstairs I felt in my pocket for the latchkey."
"For what reason? You did not need the key to open the door from within?"
"I cannot say why I did it. I can only tell you what is in my mind."
"Have you the latchkey now?"
"No, I have lost it."
"Where?"
"I do not know where."