A GEORGE II GILTWOOD AND GESSO TRIPTYCH MIRRORCIRCA 1735 With two girandole arms41cm high, 148cm wideProvenance: Property from the Phillip Lucas Collection, Spitalfields HouseFor a giltwood triple mirror of similar form see Graham Child, World Mirrors 1650-1900, pl 78. These overmantel mirrors share the typical gilt gesso decoration and similar pattern of frame to the upright mirrors of the period, but upright and pier mirrors of the early 18th century far outnumber the overmantels. The rarity of overmantel mirrors could be explained because there are far more pier walls whereas there is usually only one chimney piece over which to place an overmantel mirror and also by the fashion of hanging a painting over the chimney piece.