HEY IB & IB...YOU FORGOT ONE LINE:
If you look at his career chronologically, it appears that after SHE wrote the Broadway play "Out of the Frying Pan," it was made into a movie, for which SHE wrote the screenplay. SHE went to Hollywood, made a living, and then gradually ended up writing gothic novels. A number of these sound very DS like so it's not surprising SHE wrote for the show.
(quick...switch the first line from HIS to HERS).
Patti