Lisa,
Did William Bentley and Mary Schofield get married at St Chad's in 9 Nov 1828?
Could this be their first child?
Baptism: 9 Sep 1829 St Bartholomew, Whitworth
Mary Ann Bentley
Daughter of William Bentley & Mary
Tongend Bridge
And is this your Mary?
Burial: 28 Oct 1849 St Bartholomew, Whitworth
Mary Bentley - Age: 40
Millhouse
I don't think the St Clements records are online but Whitworth Library does local research or Touchstones Arts and Heritage in Rochdale may be able to help?
Regards
Karen