Hi Peggy
I can't find a marriage for Robert Meggeson and Hannah in Sedgefield.The only one I can see in Family search is for Robert Meggeson and Hannah Dunwell 19th June 1769 Kirk Hammerton Yorks.So I don't think that would be the one.
If you click on the posting I sent to Fernvic,a couple back from this posting,you will see the link for the Parish records.
Sedgefield only starts from 1769.One of Robert and Hannah's daughter's Baptism's is there. Dorothy Meggeson Baptised 5th Nov 1769.You will find that on Page 3 Sedgefield.
Also on page 11 you will find the marriage for Robert Meggeson and Jane Davison.26 June 1773.
You might be able to find the other children of Robert and Jane on there as well.
The marriage for Hannah Meggeson and Ralph Bell married 28 Nov 1773 are on page 11 as well.
There is a death for Hannah ..wife of Robert Meggeson buried 7th May 1773.also on page 11
Hope that helps.Maureen