I am a great grandson of Thomas Sandercock, and have two photos one of Thomas and one of Elizabeth, let me know if you want me to e-mail you copies of them!

I've attached thumbnails from the original pics.
Below is a record from 1881 that I believe is correct for them, I have not verrified this yet.
Thomas SANDERCOCK Head M Male 42 born Abbotsham, Devon, Gardener (Nd) ((Dom Serv))
Elizabeth SANDERCOCK Wife M Female 40 born Bideford, Devon
William SANDERCOCK Son Male 12 born Bideford, Scholar
Jane SANDERCOCK Daur Female 11 born Bideford Scholar
John SANDERCOCK Son Male 8 born Bideford Scholar
Clara SANDERCOCK Daur Female 3 born Northam, Devon Scholar
Minnie SANDERCOCK Daur Female 1 born Bideford
8 Vinegar Hill
Bideford, Devon, England
RG11/2258 Folio 30 Page 10