Oooooooooh ! I think we might have a link here !
This is what I know - for sure !
Mary ARDILL was born in Tipperary (don't know where) c. 1830 her father was James ARDILL
Mary married John ARDILL in Thurles on 22 March 1855
They had children : Frances, Prudence, John Roche, Henry & Letitia (all born Tipperary)
I believe they came to England in the 1860's. In 1867, James ARDILL died aged 55 (in Rachel Street. Liverpool) - Mary registered his death.
By the 1871 census they were in Bolton - 4 Edge Street
Mary Ardill Head 35 Widow Houekeeper
Frances dau 15
Prudence dau 14
John R son 13
Letitia dau 8
This would make John Roche born 1857/8
In 1873 Mary re-married to a Patrick Casey, but he died soon afterwards and she reverted to the name of Ardill (probably because of her children)
Henry ARDILL was listed on one of the census' as 'idiot from childhood' and died in his 30's.
In 1881 - John Roche ARDILL died - aged 22 - cause of death 'fit' - he died in the Royal Hotel, Bolton - there was an inquest, but I have not had chance to look this up yet.
SO - if any of this fits into anything you have - let me know. I have not been able to REALLY discover who Mary's mother was.....I would like to think it was Frances Henrietta (mainly because of the children's names) ...but I don't even know if she had any siblings.....
Her husband John ARDILL...I think was possibly the son of John Ardill & Prudence Cleary (again because of the name)