Where is the Dueling Houses quest ?

Where is the Dueling Houses Quest ? I see from Guildwiki that it is given by Duelmaster Vaughn in Drazach Thicket.

But where is he ???

I've tried leaving from Brauer Academy because they told me it was right outside, I can't find him.

Please help.

You have to exit to the North-East. He's standing near the respawn point, and he's always got a ! over his head.