XYC173909 Entrance to the Cave, Richmond Gardens, plate 18 from \'Kew Gardens: A Series of Twenty-Four Drawings on Stone\', engraved by Charles Hullmandel (1789-1850) published 1820 (hand-coloured litho) by Papendiek, George Ernest (1788-1835) (after); image: 11.5x15.5 cm; Yale Center for British Art, Paul Mellon Collection, USA; (add.info.: built by Queen Caroline in 1735; also built another grotto before in 1732;); British, out of copyright.