Matilda,
Here's some details I found quickly;
1881 Census - 12 Pugsleys Court, Barnstaple, Devon
RG11/2243
William SCOINS b. 1823 in Chittlehampton, Devon - Labourer
Caroline SCOINS b. 1831 in Middlesex
James SCOINS b. 1858 in Chittlehampton - Labourer
Mary A SCOINS b. 1862 in Chittlehampton - Hawker of Fish
Rose SCOINS b. 1875 in Barnstaple (granddaughter)
1881 Census - 25 Bodens Row, Barnstaple, Devon
RG11/2244
Henry SAUNDERS b. 1857 in Taunton, Somerset - Licenced Hawker
Rachel SAUNDERS b. 1858 in Chittlehampton, Devon
Mary A SAUNDERS b. 1876 in Barnstaple
William H SAUNDERS b. 1877 in Barnstaple
John SAUNDERS b. 1881 in Barnstaple
Birth - William Henry SAUNDERS
Jun qtr 1877 Barnstaple Vol 5b Pg 467
1871 Census - Green Lane, Barnstaple, Devon
RG10/2183
William SCOINS b. 1817 in Chittlehampton, Devon - Labourer
Caroline SCOINS b. 1831 in London
James SCOINS b. 1855 in Chittlehampton - Labourer
Rachel SCOINS b. 1856 in Chittlehampton
Mary A SCOINS b. 1862 in Chittlehampton
1861 Census - Frog Street Chittlehampton, Devon
RG9/1487
William SCOINS b. 1811 in Chittlehampton, Devon - Labourer
Caroline SCOINS b. 1821 in London - Stay Maker
James SCOINS b. 1854 in Chittlehampton
Rachel SCOINS b. 1858 in Chittlehampton
William Gilbert SCOINS b. 1860 in Chittlehampton
Birth - William Gilbert SCOINS
Mar qtr 1860 South Molton Vol 5b Pg 471
1851 Census - Chittlehampton Village, Devon
HO107/1891
William SCOINS b. 1817 in Chittlehampton, Devon - Labourer
Catherine SCOINS b. 1823 in London (Catherine is obviously an error)
Margaret WILLIAMS b. 1845 in London (listed as daughter despite difference in surname)
Marriage - William Maine SCOINS m. Caroline WILLIAMS
Dec qtr 1849 South Molton Vol 10 Pg 309
I have not investigated whether Caroline was previously married, or whether she bore Margaret out of wedlock? What a frustrating family, some family members seem to change their year of birth like a change of clothes (they don't appear to be transcribing errors).
Regards,
FishMan