Tribunal:Muckraking Journalist

Quick Walkthrough
#Speak with Tienius Delitian in the Royal Palace Throne Room and agree to help him find the anonymous writer of The Common Tongue. 
#Speak with people to be directed to a bookshop or pawnshop. 
#Talk with Ten-Tongues Weerhat in the Great Bazaar Pawnshop to learn of Trels Varis in the Craftsmans Hall of Godsreach (high disposition needed). 
#Find the locked door in the Craftsmen's Hall, which leads to a secret area with Trels Varis. 
#Convince Trels to stop printing the Common Tongue. 
#Return to Tienius. 

Detailed Walkthrough
Tienius Delitian
Speak again with Tienius Delitian in the Throne Room and agree to help him stop the anonymous writer of The Common Tongue. Tienius doesn't particularly care how you stop this author, which is a not so subtle hint that he would prefer you to kill whoever is involved. 

Rumors
Speak to most anyone about the anonymous writings and, if their disposition is high enough, they'll tell you to speak with someone involved in writing (like a bookstore) or possibly a pawnshop. Head on over to the Great Bazaar, which conveniently has both such stores. Talk to Sanaso Sarothran in the bookshop to find out she will merely offer the same advice and has nothing new. Next check out Ten-Tongues Weerhat in the pawnshop across the way. With enough persuasion, he'll tell you that Trels Varis is the author and that he first heard about him in the Craftsmen's Hall in Godsreach, which is where you should head next.

Craftsmen's Hall
Speak to people in the Craftsmen's Hall in Godsreach about the anonymous writer, Trels Varis, and you'll hit a dead wall. Don't believe them for a second though, as they are far too adamant about things to be above suspicion. Investigate the area and find a locked door (70) named "Keep Out!" on the bottom level, which leads to a secret office. Confront Trels inside and ask him to stop printing the lies about King Helseth. You have several options to try and make him stop:

Bribe him: Give him 3,000 gold.  Tienius will cover your expenses and give you the King's Oath sword.  (Note: if you try to do this and you don't have 3,000 gold, he will attack you, and you'll be forced to kill him, forfeiting the reward of the sword.)
Blackmail him: If you've met his parents, Granny Varis and Gee-Pop Varis, the caretaker and gardener at the Mournhold Temple, you can threaten to kill them, and he will agree to stop. Note that you must have discussed the Trels Varis subject with both parents to gain this option. Tienius will reward your efforts with 5,000 gold and King's Oath.
Flaunt your Reputation: If your Reputation is over 40, you can get him to let you go, by promising to keep his secret.  You will not get the sword this way, but you will still receive the 5,000 gold reward.
Entertain him: Tell him you seek the Eye of Argonia.  He'll appreciate the originality, and let you go.  This will get you the same reward as flaunting.
Give an Honest Lie: Tell him you were just coming to rob the place.  He won't approve, but at least he'll let you go.  This also gives the same reward as the previous two.
Kill him: Tell him anything else, and he and his henchmen will attack you.  Once they're dead, you can again receive the same 5,000 gold reward, but no sword. Nobody in the Craftsmen's Hall will talk to you if you take this option.

Return to Tienius
Return to Tienius who seems to know exactly what happened somehow. If you donated the 3,000 gold to the Orphan's Fund you can either tell Tienius it was a small sacrifice and receive 3,000 gold and King's Oath and 30 disposition award, otherwise, if your disposition with him is less than 70 and you expect your expenses will be covered, you will receive 8,000 gold, but not Kings Oath.  If you did not donate the 3000 you will get 5,000 gold, and also King's Oath if Trels Varis is still alive. Tienius tells you to speak with Queen Barenziah for a last official matter.

Notes
If you take the "Reputation", "Entertain" or "Lie" routes, Varis' disposition drops 20 points.

Quest Stages