Miscellany
A surgeon in the British navy published an 1816 treatise on “The Incubus, or Nightmare, Disturbed Sleep, Terrific Dreams, and Nocturnal Visions,” arguing against folk beliefs that nightmares resulted from overindulgence and sleeping on one’s back. Sufferers “can bear testimony to the distress and alarm,” he wrote, “in many cases rendering the approach of night a cause of terror, and life itself miserable.”