Been having another look for 1881 & this family does like to confuse with using middle names.
1901 census shows daughter Jane now widowed as Maddern, with children Samuel & Laura. OPC database shows their father as James Henry Maddern. He married Mary Jane Bawden sep qtr 1895 Redruth vol 5c pg 360. There is a baptism for Mary Jane Bawden of William Street 24 Jan 1895 mother Hannah but father Joseph.
1881 33 Centenary Row, Camborne RG11/2334 folio 98 pg 25
Elizabeth Renfree widow 54 b. Gwennap
Emily dau 18 tin mine labour
Mary Jane Haris boarder 6
Louisa Kemp boarder ? mo
all born Camborne except Elizabeth
1861 has a possible for 8 year old Hannah Harris with widowed father William RG9/1583 folio 46 pg 35 leading to this family in 1851
Wellington Street, Camborne HO107/1916 folio 19 pg 31
William Harris head mar 39 mason
Hannah wife 42 b. St Kew
William son 9
James son 6
Mary Jane dau 1
all born Camborne except Hannah
Likely marriage for William & Hannah
http://www.cornwall-opc-database.org/search-database/more-info/?t=marriages&id=1044825