It must be the other Betty Mather (1778-1823), wife of John who died in 1823 giving birth to Alice (as if born in 1778, then this Betty was too young to marry John in 1790)
Name Betty Mather Age 72 Birth Year abt 1768 Burial Date 18 Feb 1840 Burial Place Billinge, St Aidan, Lancashire, England Parish as it Appears Wigan and Billinge
MATHER, BETTY 74 GRO Reference: 1840 M Quarter in WIGAN UNION Volume 21 Page 721
General Notes
Betty Baxton or Baxter (Baxster on marriage record)
In Dec 1823, Betty died, aged 45 giving birth to Alice.
Daughter Alice was baptised 29 Feb 1824 after Betty had died (probably soon after childbirth). Alice went on to live with her sister Ann and brother James
Betty and John were married in a religious ceremony on October 14th, 1790 at All Saints (Wigan).2 They had a son and two daughters, named Richard, Jane and Sarah. There are possibly more children.
Name Jane Mather Event Type Baptism Baptism Date 8 Jul 1792 Baptism Place Billinge, St Aidan, Lancashire, England Father John Mather Mother Betty Mather
Then another in 1793 (more likely as 39 when died):
Name Jane Mather Event Type Baptism Baptism Date 7 Jul 1793 Baptism Place Billinge, St Aidan, Lancashire, England Father John Mather Mother Betty Mather
Jane, daughter of John & Betty Mather of Billinge (no occupation shown)
She died at the age of 40 in October 1833 in Billinge. She was buried on October 9th, 1833 at St. Aidan (Billinge).2
Death Notes
Name Jane Wiswall Age 39 Birth Year abt 1794 Burial Date 9 Oct 1833 Burial Place Billinge, St Aidan, Lancashire, England Parish as it Appears Wigan and Billinge
Name Richard Mather Event Type Baptism Baptism Date 6 Apr 1800 Baptism Place Billinge, St Aidan, Lancashire, England Abode: Billinge Father John Mather Mother Betty Mather