Maybe 2 different couples:
George Hillier
Marriage or Bann Date: 28 Feb 1822
Marriage or Bann Place: Enford, Wiltshire
Spouse: Ann Peirce
I did notice the 1836 Marriage on FreeREG but it didnt say George was widowed.
So presume this is George in Woodborough in 1841 Census:
Geo Hillier, 45, Shoemaker
Wm Hillier, 2
Thomas Hillier age 10 weeks is living with another Family ( entry on same page)
May be the boys 1851.
William Hillier 15
Thomas Hillier 12
In Devizes Union Workhouse, both down as born Pewsey