[1] In 1838, Mix was appointed by President Martin Van Buren as a clerk in the Bureau of Indian Affairs.

[1] He served as acting commissioner in August 1853 and June 1856 while George Washington Manypenny was traveling in Nebraska and on temporary absence, respectively.

[6] He was appointed as commissioner of Indian Affairs, after the resignation of James W. Denver, serving from June 14, 1858 to November 8, 1858.

[8] He is interred at Oak Hill Cemetery in the Georgetown neighborhood of Washington, D.C., along with his wife and children.

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