"Biographical Sketch" in "Samuel Merrill Papers, 1818–1934"(PDF). Indiana Historical Society. January 2, 2002. Retrieved November 29, 2017.
Merrill, "Samuel Merrill," pp. 56–59; "Biographical Sketch" in "Samuel Merrill Papers, 1818–1934"(PDF). Indiana Historical Society. January 2, 2002. Retrieved November 29, 2017. See also: George W. Geib (1987). Lives Touched by Faith: Second Presbyterian Church, 150 Years. Indianapolis, Indiana: Mallory Lithography, Inc. ISBN0961935103.
Catharine Merrill; Katharine Merrill Graydon (1934). Catharine Merrill, Life and Letters: Collected and Arranged. Greenfield, IN: The Mitchell Company. p. 31. OCLC7102104.
In Memoriam: Jane Merrill Ketcham, February 2, 1819 –September 21, 1911. 1911. OCLC23162975. (Collections of the Indiana Historical Society.)
Arville Funk (1969). A Sketchbook of Indiana History. Rochester, Indiana: Christian Book Press. p. 210. OCLC49694.
William Wesley Woollen (1975). Biographical and Historical Sketches of Early Indiana. Mid-American Frontier (reprint ed.). New York: Arno Press. p. 367. OCLC1218324.