NEW HAVEN, CT.- This summer, the Yale Center for British Art will present a small, fascinating exhibition that is both an engaging visual puzzle and an exploration of the art world in 1820s London. In 1829, the young artist John Scarlett Davis sought to make a splash on the London art scene with his painting Interior of the British Institution. An image of a nineteenth-century art exhibition, the painting is also an elaborate puzzle that includes miniature works by famous British artists. Opening June 24, Seeing Double: Portraits, Copies and Exhibitions in 1820s London will offer visitors an entertaining opportunity to decode the puzzle and in the process explore the relationship between display and replication. Long recognized as a valuable record of a period exhibition venue, Interior of the British Institution represents canvases by Sir Joshua Reynolds and Thomas Gainsborough, among other British masters. What is less known is