Hello Claudia
This is a toughy.It's on the border of Staffs and Worcs and Sedgley is an area of many small hamlets.
If they came from Gornal Wood then John would likely be a coal miner.
There are many small pits in the area and they would have gone where the work was.Sedgley does have settlement certificates but they start to late for you.It also unfortunately has many early non-conformist chapels which start really early.A tree on line has him as the son of Thomas and Mary from lower Gornal but gives no date of birth.
I can only see a baptism for a John Harvery over the parish border at Wolverhampton 17.5.1771 to Bridges and Dorothy Harvey.
They are a cosmopolitan couple married in London 24.5.1761 at St Micheals ,both of this parish and her name Dorothy Morley.
All they children however are at Wolverhampton St Peters.
Elizabeth 5.10.1762,Sarah 20.1.1764,Ann 27.9.1765-11.1.1765,Catherine 19.3.1767.Sarah 16.6.1769,Bridges 13.1.1776 and Mary 27.4.1778.
Bridges junior is apprenticed at Coventry to Goodman and Blyfield mercers in 1790 and is buried at Doddinghurst Essex 16.2.1849.
This fits in with a possible baptism for his father 27.4. 1737 at Warwick St Mary to Bridges and Sarah Harvey
Bridge senior may have been apprenticed to Francis Blencowe ironmonger at Brockley Northanhts in 1753.If so that would fit nicely with a Bridges Harvey ironmonger of Wolverhampton bankrupt 1764 in the Gentleman's magazine.
Here is a website which will fill you in on Sedgley
www.sedgleymanor.comThere are early rates books of Wolverhampton but they are not online and I would confirm the connection before making the trip.
Beddall is more of a Dudley ,Gornal name and I can't see anything for Walsall but it does fit nicely with the children's baptisms.
ps Walsall is saddles and leather goods.What did John do for a living?
Got a Sarah Bedall Walsall 23.7.1763 d of William and Sarah on Freereg!
Have a quick look there and see what you think.It is quite early.Was she a spinster when she married?
Ciderdrinker