Jekyll and HydeWatch
but a few quotes about duality:
"for while jekyll would suffer smartingly in the fires of abstinence, hyde would not even be conscious of all he lost"
"if i am the chief of sinners, i am the chief of sufferers also"
"i was still cursed with my duality of purpose"
"between these two i felt i had to choose"
"the balance of my nature might be permanently overthrown"
"that ugly idol... i was conscious of no repugnance, this too was myself"
"i was coming home from some place at the end of the world, about three o'clock of a black winter's morning"
"i must go home and read these documents in quiet"