Served on the Iowa Supreme Court from January 1, 1913, to December 31, 1924. For two years he was Chief Justice.
Born at Newton, Iowa, February 13, 1858 - the first native Iowan to serve on the Iowa Supreme Court. He attended Iowa College (now Grinnell), after which he entered the mercantile business in Newton. In 1883 he went to Oskaloosa to read law in a private law office and was admitted to the bar in 1884. For four years from 1892 he was County Attorney of Mahaska County. In 1902 he was elected Judge of the District Court, where he continued to serve until elected to the Supreme Court. After his retirement from the court he spent much of his time in the state of California.
Justice Preston died in Oskaloosa January 18, 1939.