Emily and George Mason; Arthur William Devis; 1762-1822; British; between 1794 and 1795; Oil on canvas; Support (PTG): 42 1/2 x 39 inches (108 x 99.1 cm); arch; boy; brother; chair; children; column (architectural element); conversation piece; costume; dance; daughter; girl; group portrait; harpsichord; Indian; interior; keyboard (sound device component); man; music; musical instruments; painting (visual work); pianoforte; portrait; rifle; servants; sister; son; stool; symbolism; tambourine; toys (recreational artifacts); woman