What other information do you have to confirm that this might be the right family?
1901 census RG13 225 folio 24
23 Duncan Square Hackney London
Joseph Smith 49 Hackney, London, Head Married Boot finisher
Sarah Smith 42 Bethnal Green, London, Wife Married
Sarah Smith 22 Bethnal Green, London, Daughter Boot Machinist
Alice Smith 19 Bethnal Green, London, Daughter Boot Machinist
Frederick Smith 15 Bethnal Green, London, Son Van Guard
Alfred Smith 13 Bethnal Green, London, Son
Elizabeth Smith 11 Hackney, London, Daughter
Florence Smith 8 Hackney, London, Daughter
1891 census RG12 97
31 Duncan Square Hackney London
Joseph Smith 38 Bethnal Green, London, Head Married Bootfinisher
Sarah Smith 32 Bethnal Green, London, Wife Married
Sarah Smith 12 Bethnal Green, London, Daughter
Joseph Smith 10 Bethnal Green, London, Son
Alice Smith 8 Bethnal Green, London, Daughter
Fredk Smith 5 Bethnal Green, London, Son
Alfred Smith 3 Bethnal Green, London, Son
Elizth Smith ½ Bethnal Green, London, Daughter
1881 census RG11 428 folio 31
14 Blyth Street Bethnal Green London
Joseph Smith 27 Loughborough, Leicestershire, Head Married Bootfinisher
Sarah Smith 21 Bethnal Green, Middlesex, Wife Married Bootfinisher's wife
Sarah Smith 1 Bethnal Green, Middlesex, Daughter
Joseph Smith 3mths Bethnal Green, Middlesex, Son
Regards
Valda