Anthrabert is the character who actually has the wine, Pierce sold it to him. When you informed the Guard that Anthrabert was the one responsible for burning Mpenzack's cart, the Guard ran down and arrested him. Don't worry, that was supposed to happen. If you go back to the room in the Inn where you first met Anthrabert, you'll find the wine on the floor.
Cheers <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
