A Papal audience; Verso: study of a machine: anatomical study of the male leg and its bones
Pen, brown ink and brown wash heightened with white over Red chalk; Verso: pen and brown ink, red chalk
sheet: 39 x 53.2 cm. (15 3/8 x 20 15/16 in.)
mount: 40.5 x 54.7 cm. (15 15/16 x 21 9/16 in.)
Gift of Frank Jewett Mather Jr.