Elmer Johnson moved to Benchland (Judith Basin County) Montana from Maitland, Missouri in 1910 to establish a homestead with his sons Floyd, 16, and his brother Author. Another son, Earl, and a daughter, Ethel Metcalfe, followed later. Mamie Ader married Floyd M. Johnson in Iowa in 1918. The couple made their home and farmed in the Benchland area until 1948 when they moved to Lewistown, Montana.
From the guide to the Mamie Ader Johnson Letter, 1925 November 25, (Montana State University-Bozeman Library, Merrill G Burlingame Special Collections)