Margaret,
that's good to know about Joseph from the point of view of all this searching

1901 RG13; Piece: 4430; Folio: 61; Page: 70
Hollinghurst Allerton Bywater
Joseph Smith 52yrs Coal Miner b Guisborough
Margaret 41 yrs b -do-
Joseph 24 yrs Coalminer b -do-
Emma 16 yrs b Yorks Grangetown
John 14 yrs b Trap Door Minder Yorks Maggra Park
Isabella 12 yrs b Castleford
Florence 10yrs b Durham Sunnyside
Maggie 7 yrs b Castleford
Halph 2yrs b Castleford
John Plummer boarder married 41yrs Coal Miner b Norwich
Thomas Leather boarder married 34yrs Coal Miner b Guisborough
Guisborough has been transcribed as Gainsborough but it reads 'Guis..'
This is what I meant re age- in 1891 Joseph is aged 38 yrs.
heywood