Jan Muller after Adriaen de Vries, ‘Hercules Killing the Hydra’, ca. 1602, National Gallery of Art, Washington, D.C.
plate: 51.1 x 36.5 cm (20 1/8 x 14 3/8 in.)  sheet: 52.2 x 37.8 cm (20 9/16 x 14 7/8 in.)