Arthur Conan Doyle,
The Adventure of the Devil's Foot
“ Yet there they sat, driven clean mad with terror, and Brenda lying dead of fright, with her head hanging over the arm of the chair. I'll never get the sight of that room out of my mind so long as I live." "The facts, as you state them, are certainly most remarkable," said Holmes. "I take it that you have no theory yourself which can in any way account for them?" "It's devilish, Mr. Holmes, devilish!" cried Mortimer Tregennis. "It is not of this world. Something has come into that room which has dashed the light of reason from their minds. What human contrivance could do that?" ”

