Inscription reads: "Sir Isaac Newton. when Bachelor of Arts in Trinity College, Cambridge. Engraved by B. Reading from a Head painted by Sir Peter Lily in the Possession of the Right Honorable Lord Viscount Cremorne." The engraving is after a portrait of Newton done by Dutch/English baroque portrait painter Sir Peter Lily [better known as Sir Peter Lely; "lely" is the Dutch word for "lily."] (1618-1680), renowned for his Van Dyke-influenced style.