George Duncan's birth place has been given as Lynchburg, VA, and Louisville, KY. He was an entertainer who partnered with Billy Brooks from Washington, D.C. Known as Brooks & Duncan, they spent much of their careers abroad.
Writer Rainer Lotz refers to them as "an African American team of eccentric knockouts." Brooks and Duncan left the United States in 1878 with a minstrel company; they lived and performed in various countries for almost 50 years. In 1922, they were in Egypt, leading the Devil's Jazz Band with four Greek musicians.
For more see R. E. Lotz, "A Musical Clown in Europe," The Black Perspective in Music, vol. 18, issue 1/2 (1990), pp. 116-126 [quotation from p. 116]; and "Lord have a duck" in Some Hustling This!: taking jazz to the world, 1914-1929, by M. Miller.