John Caldwell was a collector of JW's prints.
Although Caldwell was not wealthy, he was artistically minded and collected a number of etchings and lithographs by JW. In 1894 he asked JW to design for him a book plate 'to please myself and honor my books' [#00503]. JW agreed but Caldwell did not have a coat of arms to put on it as JW requested. Arrangement in Black: Portrait of Señor Pablo de Sarasate (YMSM 315) was sold by E. G. Kennedy to the Carnegie Institute in Pittsburgh on 30 November 1896 through the efforts of Caldwell. The two men were in correspondence in the 1890s.
Caldwell was the Chairman of the Board of the Carnegie Art Galleries in Pittsburgh at the time of their second annual exhibition of 1897, when JW was on the Paris advisory Committee (see #00540).
Caldwell was manager of the United States Fine Arts Section at the Paris Exhibition in 1900 where JW's Mother of Pearl and Silver: The Andalusian (YMSM 378) was hung. He was a member of the Grolier Club in New York which published E. G. Kennedy's catalogue of JW's etchings in 1910.
Young, Andrew McLaren, Margaret F. MacDonald, Robin Spencer and Hamish Miles, The Paintings of James McNeill Whistler, New Haven and London, 1980.