For people just starting, there is an old 'young adult' book which you can still find online.
"A True Cornish Maid" by G.Norway. (Blackie & Sons)
The hero & heroine are Chegwidden twins - whether they were based on real children, I don't know, but there are lots of twins along the Cheg branches. There's a great description of Newquay, the bay, and life in the village - AND the smuggling. About 1800 or a bit earlier - when Wesley was preaching around England.
The other book is Dorothy Scannell's book "Mother Knew Best", also available online, which tells about her family (descendants of Walter Thomas Chenoweth Cheg., younger brother of Elias). She has a great sense of humour, and it is a good read.