Commentary of the British Museum: "Vignette showing a scholar seated in a chair at right with his left eye closed, while trying to reach for a stick with his right hand, three putti at left, one of which holds the stick; unsigned; after Peter Paul Rubens; illustration to the fourth book of Franciscus Aguilon's "Opticorum" (Antwerp: 1613). c.1613 Engraving"; In the book of Corsiniana, this print illustrates the book three and not four as indicated by the Britisch Museum; Not mentionned in the bibliography
