Hello Joyce,
I think you might be getting a tad confused.
You refer to a Mary A CASEY who is 20, b Blackpool, living in Habergsham Eaves in 1891 and suggest she is the same as a Mary A CASEY who was "on the 1871 census age 9". But someone aged 9 in 1871 would be ca 29 in 1891 ...
Do you mean aged 9 in 18
81??
Are you talking about the family of James CASEY & wife Catherine??
I will try to set down some details of this family - it might help everybody in investigating your puzzle.
1865Probable marriage. Dec qtr Fylde. James CASEY, a Cathrine KEOUGH on the same page.
1871RG10/4146/150/24
7 Basket St, Burnley, Lancashire
CASEY
James, Head, 25, Cab Driver, b Ireland Co Myo.
Catherine, Wife, 20, b Dublin
John, Son, 4
Thomas, Son, 3
Edward, Son, 2
Mary Ann, Daughter, 1
Children all born Blackpool
1881RG11/4147/67/50
41 Milton St, Burnley
CASEY
James, Head, 38, Cab Driver, b Irland (sic)
Catherine, Wife, 33, b Oldham, Lancashire
Thomas, Son, 13, b Blackpool
Edward, Son, 12, b Burnley
Mary A, Daughter, 9, b Preston
Catherine, Daughter, 7, b Bolton
James, Son, 7, b Burnley
Martin, Son, 5, b Burnley
Ellin, Daughter, 2, b Burnley
1891*RG12/3364/12/18
8 Raws Ct, Burnley
CASEY
Thomas, Head, 23, General Labourer, b Oldham
Edward, Brother, 22, Coachman, Blackpool
Ellen, Sister, 12, Scholar, b Blackpool
and a lodger
All are unmarried
*RG12/3367/19/5
Habergham Eaves
Mary A CASEY, Servant, Unmarried, 20, General Servant, b Blackpool
There is nothing in the 1871 and 1881 censuses which would suggest that this Mary A(nn) CASEY was anything other than the daughter of James & Catherine.
Incidentally, there is no actual mention in the above censuses of Poulton-le-Fylde. But it does seem likely that John, Edward and Mary Ann are the following three CASEY births registered in Fylde - John Sep qtr 1866, Edward Jun qtr 1869, Mary Ann Jun qtr 1870.
You say that this Mary A CASEY was "living with who i believe to be my Mary Anns parents".
If by "my Mary Ann" you mean Mary Ann (CASEY) HART b 1855, then that's simply not possible.
James and Catherine are
far too young to be the parents of "your" Mary Ann.
In 1881, James & Catherine are recorded as 38 and 33 (and in 1871, their recorded ages were even lower - 25 and 20). "Your" Mary Ann (wife of John HART) was 26 in 1881.
I wonder where the idea (i.e. that "your" Mary Ann had parents named James & Catherine) came from?
Regards,
JAP