this book looks particulary interesting.

'Ever wondered how to cook Thomas Hardy's frumenty, make Izaak Walton's
Minnow Tansies or pickle elder buds?' asked the Sunday Telegraph. 'Good Things in England is a collection of 853 regional recipes dating back to the C14th. First published in 1932, it was written by Florence White, the country's first ever freelance food journalist, and, like all classic culinary works, it is a pleasure to read.'

but it's late and I'm tired so I'll have a better look at the site tomorrow.