Heroides.
Ibis.
Metamorphoses.
Tristia.
Oviedo y Valdés, Fernandez de, Historia General y Natural de las Indias. Madrid, 1851-1855.
Oviedo y Valdes, G. F., Histoire de Nicaragua. Published in Ternaux-Compans's Voyages, relations et mémoires originaux, pour servir à l'histoire de la découverte de l'Amérique. Paris, 1840.
Owen, Rev. Elias, Welsh Folk-lore. Oswestry and Wrexham, n.d., preface dated 1896.
Owen, Mary Alicia, Folk-lore of the Musquakie Indians of North America. London, 1904.
Owen, Captain W. F. W., Narrative of Voyages to explore the Shores of Africa, Arabia, and Madagascar. London, 1833.
Oxyrhynchus Papyri. Ed. B. P. Grenfell and A. S. Hunt. Part iii. London, 1903.