Image taken from Dovercards, however documentation and dating from The Smithsonian Catalogue of Works
Ormond, Richard and Elaine Kilmurray, "John Singer Sargent: complete paintings; volume 1, The early portraits," New Haven, CT: Yale University Press, 1998, no. 32.
McKibbin, David, "Sargent's Boston," Boston: Museum of Fine Arts, 1956.
"Privately owned: a selection of works of art from collections in the Washington area, Feb. 10-Mar. 30, 1952," Washington, D.C.: Corcoran Gallery of Art, 1952.
Ormond, Richard and Elaine Kilmurray, "John Singer Sargent: complete paintings; volume 1, The early portraits," New Haven, CT: Yale University Press, 1998, pg. 50.
"Privately owned: a selection of works of art from collections in the Washington area, Feb. 10-Mar. 30, 1952," Washington, D.C.: Corcoran Gallery of Art, 1952, p. 49.