My Roberts line is through John J. Roberts; his son, Henry John, b. 8-14-1819 SC; d. 1-21-1874 FL; m. 7-18-1839 Madison Co., FL to Dorcus (Doria; Doria J.; Dorea S. ) Polk b. 1823. Didn't find him in any census, but she is listed as ROBERTS, in Census: 1860 Suwannee co., Fl; 1880, 1885 Prec. 2, Lk. Butler, Bradford Co., FL and 1910 Suwannee Co., FL HH of grandson, Thomas Platt. She was in the HH of granddaughter, Lydia Ann Platt Ellison (mother was Susan Elizabeth Roberts) at time of death. My mother (Eva I. Ellison Cumbie)was b. 1911 and she remembered caring for Dorcus when mother was a child. She isn't in 1920 Census so figured she died 1915-1920. Have no more info on POLK except her father was b. England and mother, SC.