He believed that the new times and customs required that knights change their attitude towards life and entrepreneurship, which he believed should become a sixth chivalric virtue. He alone resigned from being a knight and took up the grain trading business using a Mill that he inherited from his mother and which made him a sizable fortune. Palmerin de Launfal maliciously even nicknamed him "Sir de la Stingy".
He first met Dettlaff van der Eretein as a customer of the young Bootblack in Beauclair, where they quickly became friends. One day he went with him to see the old mill. During the inspection of the building Dettlaff killed the Count by piercing his heart, then stuffed a bag of florens from different provinces of Nilfgaard down his throat before quartering his body and throwing the pieces into the river. Overcome by guilt for murdering a friend, Dettlaff then cut off the hand that pierced the Count's heart and threw it into the river.
The remains of the Count were noticed by the innkeeper at The Cockatrice, who called the guards. The body parts were then fished out of the river and took to Corvo Bianco, which had been temporarily converted into a morgue. Geralt investigated the shallows and networks with Milton, where the body was found, and noticed a monogrammed handkerchief by which the corpse was identified.