|To Start: Speak to Milford in Blackspore Swamp.|
Milford says,"You should go find Master Eggert. I still have so many secrets to learn from him!
I don't know what I'd do if he didn't return! I guess I'd get all of his things... live in his tent... look through his notes to see what the old coot has been scheming up...
Actually... You should go. I have some things to do. "
You need to find Eggert the Mad to complete Darkthorne's request.
This is a Combat quest. Membership is required to begin this quest.
When you have saved Eggert, Vittorio and his two cohorts appear and take the contents of box from you. So it seems that the box contained a poison.