I have the same problem, Alchemist is not where he is supose to be.
Did you explore the area before you got the quest to find the alchemist? - I did, now he's not there.
I think you should go to this area only after you recieved the quest to find him - had to go back a looooong way to start again.
<img src="/ubbthreads/images/graemlins/alien.gif" alt="" />
