Robert Ingersoll applied this term to James G. Blaine in the political campaign of 1884.
1888. In the window were two democratic ladies, who did not know that the Plumed Knight was beneath them.N.Y. Herald, Nov. 4 (Farmer).
1908. I recall looking down upon the red and silver of the Plumed Knights [in a Republican parade] from the window of my uncles newspaper office, thrilled in spite of my ultra-Democratic training by the swing of their unbroken tread and the glamor of the music and the lights.N.Y. Evening Post, Oct. 29.