Christopher Donson Born 1767 Somewhere IN Lincolnshire I M Assuming but Can T Find His Baptism

also he married around 1788 as their first child was born 1789. Would love to find his baptism and his marriage but have hit a brick wall. his wife is Elizabeth but don't know the surname, all his children were born at Welbourn in Lincolnshire and Christopher and his wife are buried at Welbourn.
Any help would be really appreciated.