This bas-relief by the Flemish sculptor Jan Claudius de Cock (1667-1735) depicts the river god Alpheus and the nymph Arethusa from one of the stories from Ovid’s Metamorphoses. Fleeing from the amorous Alpheus, Arethusa is changed into water by the goddess Diana. This relief is the companion piece to the one in the right front room. Signed and dated 1707, they predate the stone frames by 17 years. During a restoration, sketches for these frames were found on the wall behind the canvases.