Sarah White
born 1846–1850
in Tadcaster, Yorkshire
died January–March 1919
in Bristol, Gloucestershire
I'm having trouble finding her before 1878 (census or birth). Could it be that 'White' is her married name from a previous marriage (even though she's described as a spinster on the marriage certificate that I have)? I thought it might help to look for one of her children's birth certificates, so I tried her son William James, but there she's still named as 'Sarah Hayman formerly White'. I've looked at Goodhind Street in 1871, but she doesn't seem to be living there. Interestingly there's a Sarah Atkinson of the right age in the 1861 census (born Tadcaster), with a father James who's a gardener, but the Sarah Atkinson–Walter White marriage in Leeds in 1872 is not her. Neither is she the Sarah Jane White whose birth is registered in Tadcaster district in the June quarter of 1843 (v. 23, p. 623). Another angle might be to look for records of staff in schools near Goodhind Street, Bristol? The best candidate seems to be the 'Boys' and Girls' School (Lower Easton School)', founded in the late 1850s (now Easton Primary School).
1878: surnamed White at the time of her marriage to Robert. Living at Goodhind Street, Bristol (with Robert). Age is 28, occupation is schoolmistress, and she is described as a spinster.
1881 census: living with husband and children at 32 White Street, Bristol. Age is 32 and place of birth is Tadcaster. Occupation is schoolmistress.
1886: living at 32 White Street when her son William James was born.
1891 census: living with husband and children at 32 White Street, Bristol. Age is 42 and place of birth is Tadcaster.
1901 census: living with husband and children at 32 White Street, Bristol. Age is 52 and place of birth is Tadcaster.
1911 census: living with husband and children at 32 White Street, Pennywell Road, Bristol (a '6 Room House'). Age is 64 and place of birth is Tadcaster.
1919: the death of a Sarah Hayman aged 70 is recorded in Bristol district in the March quarter of 1919 (6a270).