Cora Smith (d. 1932) married first to Samuel James Colgate; secondly, Henry William John Byng, fourth Earl of Strafford in 1898; thirdly, Martyn Thomas Kennard.
(SIRIS)
Ormond, Richard and Elaine Kilmurray, "John Singer Sargent: complete paintings; volume 3, The later portraits," New Haven, CT: Yale University Press, 2003, no. 547.
McKibbin, David, "Sargent's Boston," Boston, Museum of Fine Arts, 1956.
Ormond, Richard and Elaine Kilmurray, "John Singer Sargent: complete paintings; volume 3, The later portraits," New Haven, CT: Yale University Press, 2003, pg. 201.