Nombre de Dios, [118].

North Americans, small number of, in Buenos Aires, [203].

Obydos, city of, [146].

O’Higgins, Bernardo, [124], [125], [126], [279].

Oil, production of, in Argentina, [192].

Ojeda, Alonso de, [20], [37];

Venezuela named by, [402].

Olinda, suburb of Recife, [158].

Opera in Buenos Aires, [206].

Orellana, Francisco de, discovers and explores the Amazon, [82], [138].