There are 6(+1) people involved in this quest.
I figured out that the correct order is important. Elsewise you have not all options to talk.
You can start the quest with
Bailiff (market place, tavern)
Jerry (toilet)
Fisherman (river)
Marianne (tavern, travel to the hut and back)
Herb woman (hut)
–Find the rotten meat
Jerrys wife (in Jerrys house)
Jerry
Bailiff
Marianne
(+1) is the smith, but you don´t need him
There are variation, but this works.
When taking to the people get every information they can offer.
At fisherman works (speech).
Marianne (ask everything)
At herb woman (strenght or Jerry)
Jerry wife is importend. Take option (Why should she do that?)
Jerry
Every option
It doesn´t care which answer.
After that go to Bailiff and Marianne.