Satanic Sibilants: John Dickson Carr’s He Who Whispers

'Prof. Rigaud!' called Miles. He lifted up his voice powerfully. 'Prof. Rigaud!'Again as when the absent one had himself called for a waiter, only the rain gurgled and splashed in the darkness. There was no reply.I had heard a lot about John Dickson Carr's The Three Coffins and so borrowed it from a friend and …