Hey, in checking out Dame Maggie Smith's birthdate -- I'm too much of a gentleman to reveal it -- I found a cross-reference to Wikipedia's page about the University College Players (Dame M appeared in an 1953 production by the Players, when she was only . . . no, not going there.)
The entry mentions the Players' outdoor production of Alice's Adventures in Wonderland in 1977 and 1978. Incorrectly, it was only 1978, and I know this because not only did I appear in that production, in four roles -- Robinson Duckworth, the Duck, the Executioner, and the voice of the pig-baby as it was tossed into the River Cherwell -- but I also adapted it from Lewis Carroll's book (and designed the poster). Yes, friends, I have lived. It was directed by my old friend, Robin Hodgkinson, who went on to marry the young lady playing Alice. Ahhhh.
But can a published mystery author get a Wiki credit for his early work? Nooooooo.