Eleanor crossed the Atlantic on the ship Camillus in 1853. Her obituary says she arrived in Utah in 1860 but on the 1910 federal census she apparently reported that she immigrated in 1862.
She married William Francis Neslen on 6 June 1863; but they divorced 1 November 1884. In the 1910 census she is listed as E. A. Mitchell. In both her obituary and in the Salt Lake City cemetery records she is under the name Mitchell.