Mary Ann Halliday
born April 1833–April 1834
  in Findon Hill, Co. Durham
died 16–30 January 1884
  in Edmondsley, Co. Durham

Maiden name from daughter Hannah's birth cert.

1841 census: (as Mary) living with parents and siblings in Findon Hill. Aged 7, born in county.

1851 census: living with parents and siblings, grandfather, and nephew in Broadmyers. Aged 17, born in Witton Gilbert. Occupation is dressmaker.

1854: Margaret Cozens has seen the marriage cert. 'Under age' at time of marriage, and living in Sacriston.

1861 census: living with husband and children on Newcastle Row, Framwellgate Moor. Aged 26, born in Witton Gilbert.

1871 census: living with husband and children on Middle Row, Broadmyers. Aged 37, born in Findon Hill. Occupation is dressmaker.

1881 census: at Swan St, Elvet, Durham (see daught. Hannah for ref.)

Margaret Cozens: died 'at Edmondsley, 50yrs old. She is buried 30th January 1884 at St Mary and Cuthbert's, Chester-le Street.'