Ruffer
I am a descendant of George Ashley b 1760 Burnett and retired University historian.
George's father was William d.1784, who married Mary Bailey in 1753.
I suspect his grandfather was another William Ashley, farming 30 acres of glebe at Burnett in 1736, married to another Mary. He built a cottage 'on the void', and the arrangement was regularized in 1745 with the feoffees of the estate, naming his wife, Mary, and his son, William, as future possessors He is likely to be the William Ashley convicted of selling beer, etc in Burnett without licence. Though not conclusive, the evidence points to two William Ashleys, father and son. At the least, we need to look for a William Ashley, old enough to be farming in 1736.
The next step might be to look for William Ashleys born 1690/1700/1710. eg amongst the Ashleys at Laverton (Somerset), there is a William, b.1697.
Incidentally, the Ashley tenancy at Burnett was given up in 1755, though they continued to farm it as sub tenants until c 1800. The amalgamation of the Burnett farms may have forced George and his children into Bristol. It could make an interesting article!
Roger