Speusippus, ancient Greek philosopher. From Thomas Stanley, (1655),The history of philosophy: containing the lives, opinions, actions and Discourses of the Philosophers of every Sect, illustrated with effigies of divers of them. [Unknown authorUnknown author / Thomas Stanley, 1655, The history of philosophy -- Public domain -- http://commons.wikimedia.org/wiki/File:Speusippus in Thomas Stanley History of Philosophy.jpg]