Bernard Capes, The Skeleton Key — Chapter 7 (1919)
“ Sir Calvin turned to the detective. 'Do you need Mrs Bingley any more?' 'Not for the present,' answered the Sergeant, and the housekeeper left the room. I had expected from him, on her disappearance, some significant look or gesture, betokening his acceptance of the inevitable conclusion; but he made no such sign, and merely resumed his business conduct of the case. He knew better than we, no doubt, that in crime the most obvious is often the most unreliable. ”
