After thinking about it for a while I decided not to mark the locations of all the roaches on this map. Assume there's a roaches around every corner and in every room, because chances are there are.
There are really only two things of note here. The first is a Pilgrim's Cloak in a hidden room. To reach the hidden room go into the second door leading to the west from the main courtyard. This will take you into a hallway. Now go into the first room to the north and check the wall in the northeast corner for a secret passage. The cloak is in the chest.
The second thing of note here is a healing pool in the far southwest corner.
After you're done here don't forget to head back to Bavner to tell Mother Loomis what you found.
