Anonymous sale; Christie's, New York, 26 September 2001, lot 255.
COMPARATIVE LITERATURE J. Pope-Hennessy, A Catalogue of Italian Sculpture in the Victoria and Albert Museum, London, 1964, vol. III, p. 143, nos. 197-198, figs. 202-203. A. Butterfield, The Sculptures of Andrea Dell Verrochio, New Haven and London, 1977, pp. 76-77.