Published in conjunction with the exhibition organized by the Department of Art History and Archaeology of Columbia University in the City of New York in cooperation with the Philadelphia Museum of Art. Exhibition was held at Wildenstein Gallery in New York from March 4, 1971 - April 3, 1971. Exhibition was held at the Philadelphia Museum of Art from April 15, 1971 - May 23, 1971. Table of Contents -- Preface -- Lenders to the Exhibition -- Whistler and His World / Allen Staley -- Le Papillon et le Vieux Boeuf / Theodore Reff - Bibliography -- Exhibitions -- Notes on the Catalogue -- Works by Whistler -- Works by Whistler's Contemporaries -- Plates