Deliver Baros Alexston's report on the Defias Brotherhood to King Varian Wrynn in Stormwind Keep.
I have prepared a report for the King. I believe you should be the one to deliver it to him, along with an account of your findings. Do not worry, there is no doubt that he will commend you for doing your duty to the people of Stormwind.
Your audience is scheduled soon, so you'd best hurry, it's a bit of a ways to Stormwind Keep.