History of the Incas, by Pedro Sarmiento de Gamboa, and the Execution of the Inca Tupac Amaru, by Captain Baltasar de Ocampo : With a Supplement a Narrative of the Vice-Regal Embassy to Vilcabamba, 1571, and of the Execution of the Inca Tupac Amaru, December 1571, by Friar Gabriel de Oviedo, of Cuzco. 1573