Deliver the Unmarked Letter to Ley-Keeper Caidanis at the North Sanctum in Eversong Woods.
I'm pleased to discover that you're at least somewhat competent, [player]. I'll give you another task since you seem so eager to prove yourself.
This is a letter to Ley-Keeper Caidanis, the arcanist in charge of the upkeep of the North Sanctum. Go southwest of Falconwing Square and you will find him. He is a very important person, so I hope you don't bother him too much with trivial chatter.