I saw a Tree for Jacob on Anc but they dont have when Mary died.
You may already have this though.
POWNALL, SAMUEL THOMAS, Mothers mn EYRE***
GRO Reference: 1853 S Quarter in ASHTONUNDERLYNE Volume 08D Page 436
1871 Census
Rachael Pownall, 44
Samuel Pownall, 17
John Pownall, 14
Annie Pownall, 12
Clarence Pownall, 9
Lilian Pownall, 7
Ernest Pownall, 4
Mary EYRE, 92, Mother, born Bradwell, Derbyshire
Mary died later that year age 92, age good age!
She is with her Daug 1861 and 1851;
John Pownall, 25
Rachel Pownall, 24
Mary Eyre, 68