Orinoco River, discovered by Columbus, [7].
Oriskany, battle of, [182].
Ostend Manifesto, [408].
Otis, James, [portrait p. 95], [128];
biographical note, [p. 94 n. 1];
on disunion in the colonies, [120];
opposes the Stamp Act, [127].
Pacific Ocean, discovery of, [11];
named [11].
Palma, Thomas Estrada, first President of Cuba, [695].