thehumanmarvels.com about Edward's death:
"The method of his death differs, sometimes poison does him in and in other versions a bullet ‘between the eyes of his devil-twin’ puts him out of his misery. In both versions Edward Morkdrake leaves behind a letter requesting that the ‘demon face’ be destroyed before his burial, ‘lest it continues its dreadful whisperings in my grave.’ "
:^/