Have you discounted this family in 1871? It contains a George Davis father and George R. Davis son, of approx. the correct age.
RG 10 / 322 / Folio 105 / Page 38
1, Albion Grove, Hackney
George Davis, head, 28, Underwriter at Lloyds, Middlesex, London
Clara M. do, wife, 29, Munich
Alice A daur, daur, 4, Kent, new Cross
George R do, son, 10 months, do Forest Hill
Elizabeth Coombs, serv., 35, General Servant, Middlesex London
Jennifer