https://books.google.com/books?id=kA-wAgAAQBAJ&pg=PA84&lpg=PA84&dq=the edge of the unknown arthur conan doyle "clear consciousness that there was someone in the room, and that the presence was not of this world."&source=bl&ots=nD_YOSPiOm&sig=ZXRVwzA9xjboDPLDuAwS7fcTZ_4&hl=en&sa=X&ved=0ahUKEwiEkZCNpufPAhUGPj4KHbYoAhoQ6AEIHDAA#v=onepage&q=the edge of the unknown arthur conan doyle "clear consciousness that there was someone in the room, and that the presence was not of this world."&f=false