Recover the Bones of St. Andral

St. Andral's church is protected by a Hallow spell, preventing undead from entering the area. However, the bones of St. Andral himself have been stolen from the church. Father Lucian says the only people who know about the bones are himself and his alter boy, Yeska. He only told Yeska recently, after the siege of the Village of Barovia left the boy terrified of the same happening to Vallaki. So far, you've established that Horace is a devout cleric/paladin of the Morninglord?!?