1850 Robert Hartman (age 25), carpenter, and Abigail (age 18) lived in Jackson Twp, Clermont County, Ohio. 
1856 They moved to Darke County, Ohio. They lived the 1st few months in Missinawa Twp, Jackson County, Ohio and from there to a permanent site in North Jackson Twp.
1857 atlas Robert S Hartman had land in section 3 of Washington Twp, Darke County, Ohio.
1860 Robert S Hartman (age 35) and Abigail Hartman (age 28) lived in Jackson Twp, Darke County, Ohio with son Franklin (age 5). 
1863 Robert Hartman joined the Ohio National Guard on 18 July 1863--a private of Lt. McNeil Co. G 28th Regiment.
1868 Abigail Hartman was buried in the Rose Hill Cemetery.
1911 Robert Hartman was buried in the Union City Cemetery, Union City, Randolph, Indiana.
Darke County Biography: "Robert S. Hartman, farmer, See 3; P. O. Union City; born in Clermont County, Ohio, Dec. 2, 1824; his father, Samuel Hartman, was born in Middlesex County, New Jersey, March 19, 1790; in 1795, be emigrated with his parents to Kentucky, and in 1801, came to the Territory of Ohio and located in Clermont County; he died May 13, 1862, upon the ad homestead, where he located sixty-one years previous; his first wife was Sarah Dunham; she died in Brown County, Ohio, in 1841, leaving eight children, of whom two now survive. The subject of this sketch was raised to farm labor until 18 years of age; the following six years he devoted to farming and carpentering; in February, 1856, he came to Darke County, and is classed among the old settlers, having been a resident for nearly a quarter of a century. He married Abigail Jones in 1849; she died in 1860, leaving one child- Franklin D. His marriage with Mary E. Marsh was celebrated in Darke County Jan. 23, 1862; she came to Darke County with her father, William Marsh, in 1853, where her father died after a residence of ten months. The children of Robert S. and Mary E. (Marsh) Hartman were eight in number, of whom four are deceased; the living are William T., Nancy E., Robert M. and George W. The great-grandmother of Robert S. Hartman, Ann Hutchinson, born March 16, 1700 (old style), was the mother of William Hutchinson, whose daughter Mary married Christophes Hartman in April, 1777; William Hutchinson was born Dec. 13, 1724; Catherine (Vohn) Hutchinson, his wife, was born May 17, 1731; their children were Mary, born March 24, 1755; William, March 12, 1757; Hannah, Aug. 9, 1759; Robert, July 26, 1763; Sylvester, April 20, 1765; Aaron, May 17, 1767; Ezekiel, Oct. 18, 1769; Ann, July 8, 1772; Catherine, Jan. 3, 1775. The grandfather of Robert S. Haktman was Christopher Hartman, born May 6, 1750; Mary Hutchinson, his wife, was born March 24, 1755; they were the parents of eight children-William, born Feb. 17, 1778; Isaac, Sept 2, 1779; Rebecca, June 3, 1781; Elizabeth, May 22, 1783; Katharine, Sept 27, 1785; Samuel, March 19, 1790; Fanny, March 5, 1793; Rachael, Dec. 29, 1796. Samuel Hartman, the father of Robert S. Hartman, was twice married; his first wife was Sarah Dunham, who was the mother of Robert S.; she died in Brown County, Ohio, in 1841; of eight children, only two now survive: his second wife was Mrs. Elizabeth (Huntington) Browning, married Oct. 17, 1844 four children were born to them—Sarah F., born Aug. 4, 1845; Jane A., May 12. 1845 Emily C., April 10. 1849; Nancy E., April 13, 1851."
 US census, 1850, lines 5-6, [FamilySearch_Image].
 US census, 1860, Reel 956, Image 653, family 314, [Internet_Archive].