Henry Davy Rule ( son of Henry Davy Rule) married Jane Hancock by banns on 4th May 1861 in Illogan.
Henry doesn't appear on any census with her and by 1891 Jane is a widow. They and their children were born in Illogan.
In 1871 Jane age 30 a tin miner's wife is living with her two children - Joseph age 8 and Elizabeth A age 2 in the Illogan district.
In 1881 Jane Rule married, age 43, is living with her daughter Annie 11 and son Joseph age 17 .Address is Carn Brea Road.
In 1891 Jane Rule a widow age 50 and her daughter Annie age 22 are living with Jane's sister Sarah Richards in Treskellard .Jane is living on her own means. In 1901 Sarah Richards is still there but no Jane, Joseph or Annie Rule.
I can't find Jane,Joseph or Ann after 1891. As for their father Henry Davy Rule,I have given up on trying to find him. May be he died abroad.
The only death I can find for Henry Davy Rule is 1866 and that is the younger Henry Davy Rule's father.