License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Wenceslaus Hollar. Gulielmus Oughtred Anglus (frontispiece from Oughtred's "The Key of the Mathematicks New Forged and Filed," 1647), 1646. The Metropolitan Museum of Art.