Hercules Slaying the Serpent Ladon in the Garden of the Hesperides
1600 · Pen and brown ink with brush and brown wash, heightened with lead white (discolored), over red chalk, on ivory laid paper, laid down on ivory laid paper, laid down on blue laid paper
24.6 × 18 cm (9 11/16 × 7 1/8 in.)
Art Institute of Chicago