He was appointed special assistant to the Attorney General of the United States, George W. Wickersham, in 1909–1913.
[1] Additionally, he served as special counsel in federal lawsuits involving The Coca-Cola Company as well as the Southern cities of Raleigh, North Carolina and Savannah, Georgia.
[2] Miller served on the board of directors of the Volunteer State Life Insurance Company.
[1] Miller married Mary Lua Gibson, the granddaughter of Confederate General John C. Vaughn,[3] on September 5, 1889.
[1] Miller died on October 4, 1929, at his private residence in Lookout Mountain near Chattanooga, Tennessee.
[4] Moreover, a professorial chair at the University of Virginia, currently held by Philip D. Zelikow, is named in his honor.