“HEAD OF AN OLD MAN.” PENCIL DRAWING BY LEONARDO DA VINCI IN THE LOUVRE, PARIS. SIZE, 9 × 6¼ IN.
“MADONNA AND CHILD.” DRAWING IN PEN AND INK BY LEONARDO DA VINCI IN THE BRITISH MUSEUM. SIZE, 5¼ × 3¾ IN.
“HEAD OF A YOUNG WOMAN.” DRAWING IN PEN AND INK BY LEONARDO DA VINCI IN THE WINDSOR CASTLE COLLECTION.
