““Stevenson had originally conceived the novel as a straightforward horror yarn, involving a thief that invents a potion that changes his physical appearance for the purpose of disguise. In a later essay, ‘A Chapter on Dreams’, Stevenson recalled how this version of the story was suggested by a dream. Disliking the initial result, which also failed to meet the approval of his wife, Fanny, Stevenson destroyed the manuscript. It is possible that it was also Stevenson’s wife who suggested that, by having the transformation happen more haphazardly, a more sophisticated story about man’s equal capacity for good and evil might be told. In any event, Stevenson grasped this idea enthusiastically, completing a new draft in three days.””
