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[http://www.nga.gov/content/ngaweb/research/casva/research-projects.html A Project of the National Gallery of Art, Center for Advanced Study in the Visual Arts ]
Johann Hermann Carmiencke (1810-1867), Hyde Park, signed and dated 'H. Carmiencke Hyde Park 1856' (lower right), oil on canvas, 17½ x 25¾ in. (44.5 x 65.4 cm.), Christies, 19 January 2000 (lot 22)
http://www.christies.com/lotfinder/LotDetailsPrintable.aspx?intObjectID=1689947