There's an Oliver M. Gallatin in 1870 Elkhart Co IN census who moved with parents Albert C. and Elizabeth to Chariton Co MO about 1881. Oliver found on 1900 census at Triplett Village, Chariton Co MO. He was bro of my ggrandmother. A now deceased cousin said Oliver m. Emma Mortiz. 1900 Census says m. 11 years. Children on 1900 census are Wallace O. b. Dec 1889 Indian Territory, Gertrude M. b. May 1891 MO, Charlie H. b.Oct 1892 MO. Oliver's middle initial doesn't match, but if any of this makes sense, we could be researching the same Gallatin line. Happy to share info if so.