New York University Institute of Fine Arts scholar; Velázquez and Goya scholar, part of the department assembled by Walter W. S. Cook (q.v.) at the Institute of Fine Arts. His students included Eleanor Tufts (q.v.).
Velázquez: A Catalogue Raisonné of His Oeuvre, with an Introductory Study. London: 1963; Velázquez' Work and World. London: 1968; Velázquez: the Artist as a Maker with a Catalogue Raisonné of the Extant Works. Lausanne: Bibliothéque des Arts, 1979; Francisco de Goya. London: , 1951; A Cycle of Goya's Drawings: the Expression of Truth and Liberty. London: Faber and Faber, 1956; Goya's Caprichos: Beauty, Reason & Caricature. Princeton: Princeton University Press, 1953.
KMP, 48 mentioned; Bazin 444