It looks like all the brick layers beneath the roof are darker as if recently under water.
But that doesn't seem possible given the much lower height of the surrounding outer walls. If those bricks are actually that saturated with water I'll bet you could pretty much knock that whole thing down with one well placed sissy kick.
Naked footprints... very appropriate for this setting. Normally the human footprints we find are shoe prints, unless on the beach or something.
It isn't difficult to imagine a scenerio in which the staff abandoned the place but left the patients behind to fend for themselves.
Thus you have half naked crazies wandering the halls while the place crumbles to ruins around them [assuming a few of them manage to survive unassisted that is].
Either that or we are all wrong and those are just hot and cold water pipes where they may have had shut off valves in an easily accessible spot at one time. All the brass or coper valves and pipes that could be stripped out would have been picked clean by thieves long ago to be sold to a scap yard, probably for dope money.
The ends of those pipes look like the male nozzles for female hydraulic hose ends. Must have been a fancy dumb-waiter not the old fashioned hand pulley kind.
Judging by the reddish color of the broken end as well as the texture of the plastic the brush appears to me made of bakelite which is sought after by antique collectors.
Yeah, and most regular hospitals when you go in the elevator...the 13th floor is called "records" right on the control panel. Or at least it's that way at StonyBrook, Mather, and St.Charles.
Or some sick kid thought it would be great to take home #666, i know a few people sick enough to do that.