Study of an Orchid, 'Vanda Roxburgia', before 1822, Watercolor and gouache over graphite on white parchment paper, Sheet: 16 1/2 x 13 1/4 in. (41. 9 x 33. 6 cm), Drawings, James Sowerby (British, London 1757?1822 London), The Sowerbys were an English family of naturalists, collectors, artists, and publishers who offered the public, amateur and professional alike, a large selection of important, original, illustrated works on natural history