Frederic Edwin Church. Frederic Edwin Church letter to Martin Johnson Heade, 1870 Oct. 24. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.
Frederic Edwin Church. Frederic Edwin Church letter to Martin Johnson Heade, 1881 December 22. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.
Frederic Edwin Church. Frederic Edwin Church letter to Martin Johnson Heade, 1874 Nov. 25. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.
Frederic Edwin Church. Frederic Edwin Church to Martin Johnson Heade., 1870 Mar. 7. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.
Frederic Edwin Church. Frederic Edwin Church, New York, N.Y. letter to Martin Johnson Heade, 1870 Mar. 7. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.
Martin Johnson Heade. Notebook on Hummingbirds, circa 1864, circa 1881. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.
Martin Johnson Heade. Martin Johnson Heade to Frederic Edwin Church, 1868 Apr. 27. Martin Johnson Heade letter to Frederic Edwin Church, 1868. Archives of American Art, Smithsonian Institution.
Frederic Edwin Church. Frederic Edwin Church to Martin Johnson Heade, 1871 Mar. 1. Martin Johnson Heade papers, 1853-1904. Archives of American Art, Smithsonian Institution.