Hi Christine, I am so sorry I missed your last message I had a alert wich went to my Email address to-day.
You are right when you talk of the fire escape being on the out-side of the building and yes it is a big building but in what capacity it is used for now I do not know. I pass it often but until you mentioned about it, it was just another building.
Weather permitting I will take a photo for you.
Sorry to hear about Hilary passing on.