In 1861 he is with his grandparents in Somerset:
Reference RG09, Piece 1679, Folio 132, Page 12
Hallatrow, High Littleton, Somerset
Weeks, George Head M 66 Coal Miner b High Littleton
Weeks, Hester Wife F 51 b Paulton
Vokes, Henry Grandson M 10 Scholar b Neath, Glamorgan
Vokes, Sarah Granddaughter F 3 b Clutton
Jenkins, Edward Grandson M 6 Scholar b Westbury, Gloucestershire
Birth:
September qtr 1851
Neath district Vol 26, Page 535
Voakes, Henry
And a marriage for the grandparents mentioned above?
December qtr 1848
Clutton district Vol 11, page 113
Weeks, George
Vokes, Hester
Finally, a submitted entry on FamilySearch:
Birth Date: 24 July 1851
Death: 4 December 1938
Mother: Sarah Vokes
Submitted entries are not always backed up by hard evidence, so you should take this information with a (large) pinch of salt!