NP but the idea-checked The World Is All That is The Case Guy, Ludwig W.-- and the blitz.

[Mark Kohut]

Just learned. When Wittgenstein wanted to "do something useful" during
the war years and Gilbert Ryle's brother got him a job as a
hospital porter,---he went back to Cambridge to give a lecture every week
or two and wanted nobody to know of this work (this I did know)--he
specified he wanted to work in a blitzed zone. Did. At Guy's Hospital.

He became interested in what was being called "wound trauma--although
THAT as real as labeled was much debated--which was being studied at Guy's.

That is all.

No, actually there is a tidbit I can add. John Ryle was impressed with
Witt's
characterization of the deadness of life as a philosophy don at Cambridge.
Willing to resign his Chair. Said he felt he was dying slowly there and
would rather risk
dying fast.