The old urban myth of the nurse in an old peoples home who cleaned false dentures.
So the story goes - the nurse decided to improve her efficiency by cleaning more than one pair at a time, and by the time she came to hand them back she realised the puzzle was just about to begin.
Trying them individually until they fitted.

Well today on radio a lady who was a trainee nurse in 1960 at the Hospital (note) St Thomases in London by the name of Stella Marsh came on to a phone-in to verify that she was there when it happened. The poor hassled nurse with not enough time (a strict regime & Sister) was identified as Margaret.

They asked if Margaret would care to phone in and confirm, with a surname. Would you?
Before the prog was over someone had cited another long past instance. Listen to this space.

(You and Yours BBC R4 Fri - you have about a week if they allow you to listen again online)