Hello Bruce,
I'm descended from William's older brother, Thomas. William is my grt grt grt uncle, according to my family history programme. Thomas had a fascinating marital history (!) which took me a long time to track, fathering 7 children with three women. My grt grandmother, Kezia, was born illegitimately, in 1862, but 10 years later Thomas married her mother. Kezia had my grandfather, Leslie Preston, in 1889 and he married Clara Corrin in 1920, having my father, Bill, in 1921.
If you'd like more details - and I have a great deal on the Cashins - let me know.
Regards,
Jo jasper2611 at aol dot com