John Augustine Waller was a medical scholar of the 18th century whose work contributed to the early understanding of sleep disorders. His seminal work, 'A Treatise on the Incubus, or Night-Mare, Disturbed Sleep, Terrific Dreams and Nocturnal Visions', delves into the enigmatic world of sleep perturbations with particular attention to the phenomenon of the incubus, better known as the night-mare. W...