this is them in 1881 census:
Dwelling: 6 Grove Road
Census Place: Isleworth, Middlesex, England
Source: FHL Film 1341325 PRO Ref RG11 Piece 1338 Folio 37 Page 6
Marr Age Sex Birthplace
James DEWEY M 31 M Isleworth, Middlesex, England
Rel: Head
Occ: Canister Maker
Mary DEWEY M 32 F Isleworth, Middlesex, England
Rel: Wife
Henry James DEWEY 10 M Isleworth, Middlesex, England
Rel: Son
Occ: Scholar
Annie Elizabeth Mary DEWEY 8 F Isleworth, Middlesex, England
Rel: Daur
Occ: Scholar
Emily Ethell DEWEY 6 F Isleworth, Middlesex, England
Rel: (Daur)
Occ: Scholar
Fred DEWEY 4 M Isleworth, Middlesex, England
Rel: (Son)
Annie Rosalie STROHM 6 F London, Middlesex, England
Rel: Boarder
Occ: Scholar
Frederick Augustus STROHM 4 M London, Middlesex, England