Some of these rooms were quite treacherous as many of the manhole covers had been removed - offering
sudden, expected and unwelcome drops to the unwary.
The tunnels looked deep and exciting in this part of the hospital - but this one was blocked with rubbish
thrown down the shaft.
"This tunnel entrance doesn't go into the main tunnels. Once at the bottom,
you could go through a thick metal door and otherwise go into the base of
the chimney to clear ash, or down over a almost completely brick filled
tunnel. I'm 90% sure now that this would have lead to the old boiler house,
and would have been used to vent steam." - Andrew.
Also see The Seventh Expedition and
The Eighth Expedition for an exploration of this tunnel.