I heard a recording on radio 4 when Dame Catherine........? was a hundred. She was a mathematician. She wad born in 1912. On the recording of the interview she said she had written a book aged 86 on maths puzzles but i did not get the name. I would like to see if it was available now. She became a don at Oxford in 1940. Please her surname and book title if you can. I have tried the BBC no reply.

Champs