Commentary of the British Museum: "Vignette showing a scholar kneeling in front of a table and looking at an object, which is projected on a screen beyond, three putti assisting; unsigned; after Peter Paul Rubens; illustration to the third book of Franciscus Aguilon's "Opticorum" (Antwerp: 1613). c.1613 Engraving"; In the book of Corsiniana, this print illustrates the book four and not three as indicated by the Britisch Museum; Not mentionned in the bibliography