F, b. October 1863
| Birth* | October 1863 | Mary E Brien was born in October 1863 at Massachusetts . |
| (with Parents) Census1870 | 11 July 1870 | She appeared on the 1870 Census of Gloucester, Essex County, Massachusetts in the household of her parents, Joseph Andrew Brien and Anna E (?) |
| (with Parents) Census1880 | 21 June 1880 | Mary E Brien appeared on the 1880 Census of Ferndale, Humboldt County, California in the household of her parents, Joseph Andrew Brien and Anna E (?) |
| (with Parents) Census1900 | 5 June 1900 | Mary E Brien appeared on the 1900 Census of Ferndale, Humboldt County, California in the household of her parents, Joseph Andrew Brien and Anna E (?) |
| (Witness) Census1910 | 19 April 1910 | Mary E Brien appeared on the 1910 Census of Oakland, Alameda County, California, in the household of William H Burwell. |
| (with Mother) Census1920 | 4 January 1920 | Mary E Brien appeared on the 1920 Census of Oakland, Alameda County, California in the household of her mother Anna E (?) |
| Census1930* | 9 April 1930 | Mary E Brien appeared on the 1930 Census of Oakland, Alameda County, California, at 665 53rd Street, enumerated 9 April 1930. |
| Census1940* | 16 April 1940 | She appeared on the 1940 Census of Oakland, Alameda County, California, at 665 53rd Street, enumerated 16 April 1940. |