On both the 1851 and 1861 Census, Ann
Trenam, widow of William Trenam, says she was born Cundall, Yorkshire. She is 71 years old in 1851, and 81 years old in 1861, making a birth date of about 1780.
1841 Census has children Ann, Jane, George, Arthur,
1851 Ann, widow, lives with daughter Mary, aged 44, and Mark, aged 39, and grandson William aged 12.
1861 Ann lives with grandson Edward aged 19.
William Trenham died 18 May 1847.
There is only one Ann Chapman born at Cundall 1780 +/- 5 years. That is the one with father John.
Baptised 30th April 1780
Ann Trenam died 25th May 1861
There's a photo of her grave here if you've not seen it
https://www.findagrave.com/memorial/233857951/ann-trenamJohn Chapman married Mary Hollings 9 May 1779 Cundall (Not seen actual image).
By the way, if you don't have a sub to findmypast (I don't), you could check with your library to see if they pay a subscription and you can access records there for free. I know many of the libraries in New Zealand do this, so I suspect Australia might do the same.
The same goes for locked films on familysearch.com. Some you can view at home if you're signed in, (free account), but some can only be viewed at an LDS family history library, or 'affiliate library' - of which some ordinary libraries are.