The Pissing Horse. Dimensions: plate: 5 5/8 x 6 11/16 in. (14.3 x 17 cm) sheet: 18.8 x 23.9 cm (7 3/8 x 9 7/16 in.). Medium: mezzotint printed in brown on laid paper. Museum: National Gallery of Art, Washington DC. Author: Nicolaas Verkolje after Phi