Move to Felwithe and look for Exterminator Valern.
His locs are: -28.57, -5.76, +3.75.
Here the dialogue:
You say, 'Hail, Exterminator Valern'
Exterminator Valern says 'Hello. Nice day, isn't it? It would be nicer if I didn't have to spend it killing these disgusting rodents that have infested town. I have an idea. How about you go kill some of them for me and collect four of their whiskers? I will reward you of course.'
Just kill the Rodent's all over in the City. Anykind of Rat Whiskers will work, also from other Citys.
Dialogue after handing in 4 of the whiskers:
Exterminator Valern says 'Here are you coins as promised. Have a nice day. I wish I could.'
Your faction standing with Merchants of Felwithe got better.
Your faction standing with Anti-Mage got better.
You gain experience!!
You receive 1 copper from Exterminator Valern.
You receive 1 silver from Exterminator Valern.
You receive 1 gold from Exterminator Valern.

