I'm going through a large collection of Scrap Books full of late 1800's newspaper cuttings.
This is where I got the piece I mentioned in the latest blog (next one will have more.)
I have been reading the notes after printed problem.s Occasionally you see a
mention of the previous week's problem being 'cooked' (unsound )
No computers in them days to do a double-check and the mistake was deep
enough for the Setter and Problem Editor to miss it. (but someone that week spotted it.)