Hi Lyn, you don't say where Sarah is from but I found this marriage
Henry Roberts & Sarah Hubbard 17 Jun 1750 St Mary, Islington Middlessex.
James Roberts
Gender: Male
Christening Date: 19 Oct 1755
Christening Place: Colne, Lancashire, England
Father's Name: Henry Roberts
Mother's Name: Sarah Roberts


hope this helps
Robert