Aged 5 in 1861 census, born Tarbuck
Aged 25 in 1881, born Tarbock, Lancashire
Aged 33 in 1891, born Tarbock, Lancashire
Aged 44 in 1901, born Tarbock, Lancashire
Lancashire 1854 to 1857 gives 3 matches (below) but both are impossible as married mothers with maiden names Low, Meacock and Fisher: There is only one illigitimate Mary Ann Grace birth registered, but that is in Hungerford (too far away).
GRACE, MARY LOW
GRO Reference: 1854 J Quarter in WEST DERBY
Volume 08B Page 317
or
GRACE, MARY ELIZABETH MEACOCK
GRO Reference: 1856 S Quarter in WEST DERBY
Volume 08B Page 385
or
GRACE, MARY JANE FISHER
GRO Reference: 1857 D Quarter in PRESCOT
Volume 08B Page 423
Instead, Mary may be a child of William Bolshaw from an earlier marriage as he appears much older than Ann. There are four Lancashire possibilities (but none close to Tarbock, East Liverpool):
BALSHAW, MARY WHITE
GRO Reference: 1855 M Quarter in PRESTON
Volume 08E Page 392
or
BALSHAW, MARY HOGARTH
GRO Reference: 1855 J Quarter in ORMSKIRK
Volume 08B Page 557
or
BALSHAW, MARY ANN BICKERSTAFF
GRO Reference: 1857 J Quarter in FYLDE
Volume 08E Page 538
or
BAYSHAW, MARY HANKINSON
GRO Reference: 1856 S Quarter in MANCHESTER
Volume 08D Page 278