Ettore Bignone is another titan of 20th century research on Aristotle's early works, and their relationship to Hellenistic Philosophy (especially Epicurus). See our bibliography for references to his publications on the Protrepticus specifically. The source of the above photograph and signature is the frontispiece of:
Epicurea in memoriam HECTORIS BIGNONE: Miscellanea philologica. Università di Genova facoltà di lettere: Instuto di filologia classica, 1959.