Thank you for your kind offer to help Michael and your time and trouble. At least that is one place I will not need to visit.
Thinking about it, as the earliest potential baptism found so far is for Robert Hall in 1806 at the Erskine Presbyterian Chapel at Belford, the marriage of William and Rachel would be more likley to be just prior to 1806 but the index of Coldstream marriages covers 1793 to 1797 so it seems. I must admit it akl seems a bit hit and miss to me looking for marriages in north Northumberland.
If there is antthing you think I can do for you in return Michael, plaese let me know.
David from Coventry