Maria Elizabeth "Lizzie" Isaacs was born about 1838 in Virginia. She was the child of Tucker Isaacs and Ann-Elizabeth Fossett, the wife of Civil War veteran William H. Dupree of the 55th Massachusetts Volunteer Infantry, and the aunt of civil rights activist Monroe Trotter. She was a descendent of the Hemings family of Monticello.
1870: "Helps Mother"
1900: 16 West Cottage Street, Boston, Massachusetts with her husband, widowed sister Virginia Trotter, and nieces Bessie & Maud Trotter
1870: Springfield, Ohio with her parents and siblings
1860: Springfield, Ohio (post office: Chillicothe) with her parents and siblings
1850: Charlottesville, Virginia with her parents, siblings, and 68-year-old Nancy Isaacs
1850, 1860, 1870: Mulatto
She passed away in 1914 and is buried at Mount Hope Cemetery in Mattapan, Massachusetts.
1850 United States Federal Census Year: 1850; Census Place: Charlottesville, Albemarle, Virginia; Roll: M432_932; Page: 203A; Image: 410; FamilySearch - account required: accessed 12 April 2016, Betsey Isaacs in household of Nancy Isaacs, Charlottesville, Albemarle, Virginia, United States; citing family 670, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.). (as Elizabeth Isaacs)
1860 United States Federal Census Year: 1860; Census Place: Springfield, Ross, Ohio; Roll: M653_1030; Page: 176; Family History Library Film: 805030 (as Elizabeth Isaacs)
1870 United States Federal Census Year: 1870; Census Place: Springfield, Ross, Ohio; Roll: M593_1263; Page: 832B; Family History Library Film: 552762 (as Maria E. Isaacs)
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHX5-5ZZ : 12 August 2017), Lizzie Dupree in household of Wm H Dupree, Boston, Suffolk, Massachusetts, United States; citing enumeration district ED 724, sheet 232D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0558; FHL microfilm 1,254,558.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2K1-M2M : accessed 1 February 2018), Maria E Dupree in household of William H Dupree, Boston Ward 16, Suffolk, Massachusetts, United States; citing enumeration district (ED) ED 1500, sheet 2B, family 50, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 620; FHL microfilm 1,374,633.
"Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2Q2-Z72P : 19 July 2016), Maria Elizabeth Isaac Dupree, 03 Jul 1914; citing Death, Dorchester, Suffolk, Massachusetts, United States, , town clerk offices, Massachusetts; FHL microfilm 800,803.