hailing him and following the text prompts to [parchment] (or saying "what parchment") he gives you a "Torn Parchment" and says maybe someone in Qeynos can decipher it.
(need 300 faction with Priests of Life to get the parchment)
(Roesager Thusten at the Temple of Life says he is looking for evidence of Plaguebringers but he doesn't take the torn parchment)