The Slate Plaque outside The Judges Library says Llysyronnen.

Close to it you will see the lock Box

Open the black Lid.  You will need a torch to see numbers if it is dark.

Press each number firmly, then turn knob to open lock box.

I will send code number in a secure message to you close to the day of check in.

If it doesnt open first time, push the switch down to clear, and then press numbers again.

Remove Key, shut box and turn knob to lock.