Segredo dos segredos (Lisboa : Faculdade de Letras da Universidade de Lisboa, 1960)
Translation of: Secretum secretorum.
Ex copy is no. 1 of 250 copies.
Includes bibliographical references and index.
Ex copy has the ink stamps of Infante D. Henrique.
Keywords: Education of princes -- Early works to 1800.; Kings and rulers -- Duties -- Early works to 1800.