Mary Mangnall was born in Bolton in 1866 and was the daughter of Peter Platt Mangnall (1832) and Betty. In 1871 she was living at 13 Peel Street, Bolton. In 1881 she was at 13 Peel Street and working as a cotton weaver.

Sources
• 1. 1871 Census. 13 Peel St, Gt Bolton. Mary Mangnall. Daughter. Age 5. Scholar. Born Bolton. • 2. 1881 Census. 13 Peel St, Gt Bolton. Mary Mangnall. Daughter., Age 15. Cotton Weaver. Born Bolton.