Donald Morrill graduated from Brown University, and practiced law in Illinois. He was the author of the book, "Civil Government of the United States and the State of Illinois." He was elected Judge of the Circuit Court of Cook County, Illinois three years before his death.

Additional information available.[1]

[1]Annie Morrill Smith, Morrill Kindred in America, Volume 2 (New York: Grafton Press, 1931), 230.