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