Roberts parents, who were both from Sandisfield, Massachusetts, lived in Nebraska in 1870 and that is where his birthplace is listed in the 1880 census. His parents appear to have registered his birth in Massachusetts and he may have used this as his birthplace later in life. He may be the Robert S. Seymour whose wife was Florence Seymour.
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MFCK-YYT : 13 January 2022), Robert Seymour in household of Sydney L. Seymour, Colebrook River, Litchfield, Connecticut, United States; citing enumeration district , sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm .
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Featured National Park champion connections: Robert is 13 degrees from Theodore Roosevelt, 22 degrees from Stephanus Johannes Paulus Kruger, 11 degrees from George Catlin, 16 degrees from Marjory Douglas, 25 degrees from Sueko Embrey, 15 degrees from George Grinnell, 25 degrees from Anton Kröller, 15 degrees from Stephen Mather, 23 degrees from Kara McKean, 17 degrees from John Muir, 18 degrees from Victoria Hanover and 26 degrees from Charles Young on our single family tree. Login to find your connection.