I have found that the doctor taking care of the plague is involved in poison problem. The bar keeper said me to ask to the doctor about the poison. But I can't put my hand on this doctor. He is neither at the plague camp nor at his house. I met him at both locations but a long time before to progress in the quest. I tried wait at right hours at each locations but in vain.
At this point is there any trick to continue?
Please avoid giving me a full walkthrough , thanks to try playing the dungeon master
and just try a hint at this point.
