OK, here are the Salmons she might belong to (clearly Salmons in 1851)
1861
RG9/814 17 12
Barrington, Cambridgeshire
William Sammans, head, 43, Farm Labourer
Ann, wife, b. Cambridge
Samuel, son, 16, Farm Labourer
Rebecca, dau, 12
James, son, 10
Elizabeth, dau, 8
Bertha, dau, 2
Charles, son, 10 mo
All but mum born Barrington
(They are Sammons again in 1871, Sarah not with them)