River, 398
“Ordinance of secession,” 385
Oregon, 385
Organic Evolution, 16
Ormuz, 299
Orsini family, 284
Orthodoxy, 240
Osiris, 200, 210, 211
Ostrogoths, 227, 431
Othman, 432
Otho, 430
Otto I, King of Germany, 265, 432
Otto of Bavaria, Prince, 354
Ottoman Empire, 202.