Half-size Sketch for The Opening of Waterloo Bridge (¨Whitehall Stairs, June 18, 1817〃), John Constable, 17761837, British, 1829 to 1831, Oil on canvas, Support (PTG): 24 x 39 inches (61 x 99.1 cm), balconies, barges (ceremonial watercraft), boats, bridge (built work), buildings, celebration, ceremony, cityscape, costume, genre subject, guards (security), houses, opening (event), people, procession, river, soldiers, uniforms, England, Greater London, London, Thames, United Kingdom, Waterloo Bridge.