Sacristy.

This had doors into the church and into the chapter-house (blocked before the suppression).

According to Buck, there was a door into the cloister;  this was not excavated (WARD) and could not be verified because it had all disappeared (C40).
There was a small pointed doorway from the cloister ambulatory, near the north end (WARD).

The room was divided into 2, one half being called the Treasury.