Smithsonian Institution Archives, Record Unit 298, Box 1, "Local Notes," 11/22/1923, p. 2.
Annual Report for the Smithsonian Institution for the year 1923. Washington, D.C.: Government Printing Office, 1925, p. 60.
Richardson Brigham, Gertrude, "Freer Collection Viewed In Private," Washington Post, 05/2/1923, p. 8.
"Sparrows Ruffle Dignity of Art Gallery Peacock," Washington Post, 08/22/1924, p. 3.
Merrill, Linda. The Peacock Room: A Cultural Biography (New Haven, Connecticut: Yale University Press, 1998) p. 352.
Summary:
On May 1, 1923, the Freer Gallery of Art opened with a private viewing for President Warren G. Harding, Mrs. Florence Kling Harding, the Smithsonian Regents and various cabinet members. In addition to the art exhibits, the courtyard became home to three peacocks. The peacocks, donated by the National Zoological Park, resemble the decorative images in James McNeill Whistler's Peacock Room. The peacocks moved back to the Zoo in the winter for safekeeping and returned to the Freer in the spring. The peacocks remained fixtures in the Freer courtyard in the 1920s.