The peppered moth

"It is 1912 and Bessie Bawtry is a small child living in Breaseborough, a South Yorkshire mining town. Unusually gifted, she sits quietly and studies hard, waiting for the day when she can sit the Cambridge entrance exam and escape the kind of life her ancestors have never even thought to question. Her parents are in awe of her - who is this swan-child, is she a freak? (Where did she get her notions? Who did she think she was?)". "Nearly a century later Bessie's granddaughter, Faro Gaulden, is listening to a lecture on genetic inheritance. She has returned to the depressed little town where Bessie grew up and all around her she sees the families who have stayed there for longer than anyone can remember. Faro's father was a desperate, wild, drinking man, the scion of part-Jewish, part-Polish, part-German refugees. But for all her exotic ancestry and glamour, has Faro really travelled any further than her Breaseborough kin?"--BOOK JACKET.