If you give Romon the scrying stone without using it yourself first, he uses it, gets teleported and suffers the predictable results.
If you went into the church, someone there would have mentioned Romon disappearing. Searching for his notes on the altar and reading them would give you the password required to enter the door at the base of the tower.
If you use the scrying stone, you get teleported, and in the dialog with the ghost there, can mindread for a stat point.