If that is the right marriage, William was a farmer, as was his father, also William.
Ann's father was James, also a farmer.
The witnesses were William and Sarah Platt.
I can't find a baptism in Haxey but a William Nelson, son of William, a farmer, and Sarah, was baptised in Messingham on 12th December 1813.
A William Smith Nelson married Sarah Wilkinson on 1st July 1813 in Messingham.
A William and Sarah had a son, John, baptised in Messingham on 26th October 1817, but William was a labourer of East Butterwick.
On the 1861 census, William gave his birth place as Butterwick.
Ann Robinson baptised in Messingham on 22nd July 1822, daughter of James and Alestia.
David