Diekmann and Grau gave Henrik Galeen the task to write a screenplay inspired from Bram Stoker 's 1897 novel Dracula , despite Prana Film not having obtained the film rights .
Diekmann and Grau gave Henrik Galeen a job to screenplay inspired from Bram Stoker 's 1897 novel Dracula , despite Prana Film not having rights to the film .