Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso)

ca. 1510–11

Red chalk, with small accents of white chalk on the left shoulder of the figure in the main study (recto); soft black chalk, or less probably charcoal (verso)

28.9 × 21.4 cm (11.4 × 8.4 in)