Stay away from the far cell in the block. Our guest is being held there. It would be best if he never saw you. I've ensured he can't look down the hall, but if you walk in front of it, he will see you.

[Batman gently lifts the lock on the door in front of him and subtly messes with it as he pulls out a key from his utility belt, and unlocks the door leading to the first area. There will be traps down this corridor. Winry's keen eye for detail might notice them, however.]