Trade the tapestry to Sobane and she'll explain the next step.
Travel to Selbina, where you will find that the person you are looking for is nowhere to be found. Talk to the mayor, Abelard, @ G-9 and he'll say he has "no idea" what you're talking about... but he will then mention something about a diary he found, and that some key pages are missing... perhaps his lips will loosen if you help him find them.
Sobane has heard some disturbing news from her husband, the head royal chef. She wishes to make a request concerning that tale, but first requires you to bring a "cathedral tapestry" to prove your integrity.
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