The staff at the India Office Library, Prints and Drawings Department at the British Library, British Museum, Public Records Office, Victoria and Albert Museum, John Ryland Library, at the Royal Asiatic Society, the Yale Center for British Art Departments of Painting, Rare Books, Prints and Drawings and the Paul Mellon Centre have all been incredibly helpful. In Calcutta I am indebted to Victoria Memorial Hall, the Asiatic Society of Bengal, the Academy of Fine Arts, the National Library and the Asutosh Museum for their assistance. My research has been greatly enriched by the courtesy of several private collectors in Calcutta: the Mullick, Deb, Bose and Nahar families of Calcutta and in particular the late R.P.Gupta.