[Ottawa River], the largest tributary of the St. Lawrence, and one of the largest Canadian rivers, is 700 m. long; rising in the W. of Quebec, it flows W., then S., then SE., sometimes in a narrow channel, sometimes broadening even into lakes, receiving many tributaries, and passing down rapids and falls, and joins the St. Lawrence at Montreal; down its waters are floated immense quantities of lumber.
[Otterburn], a Northumberland village, 16 m. S. of the border, famous as the scene of a struggle on 19th August 1388 between the Douglases and the Percies, at which the Earl of Douglas lost his life, and Hotspur was taken prisoner. See [Chevy Chase].
[Otto] or Attar of Roses, an essential oil obtained by distilling rose leaves of certain species in water, of very strong odour, pleasant when diluted; is used for perfumery; it is made in India, Persia, Syria, and at Kezanlik, in Roumelia.
[Ottomans], the name given to the Turks from [Othman] (q. v.).
[Otway, Thomas], English dramatist, born in Sussex, intended for the Church; took to the stage, failed as an actor, and became a playwright, his chief production in that line being "Alcibiades," "Don Carlos," "The Orphan," and "Venice Preserved," the latter two especially; he led a life of dissipation, and died miserably, from choking, it is said, in greedily swallowing a piece of bread when in a state of starvation (1651-1685).
[Oubliette], an underground cell, perfectly dark, in which prisoners were subjected to perpetual confinement, was so called as being a "place of forgetfulness," or where one is forgotten; they were often put secretly to death.
[Oudenarde], a town in Belgium, 15 m. S. of Ghent, scene of Marlborough's third victory over the French in 1708; it contains a 16th-century hôtel de ville, with a fine tower, and some interesting churches.
[Oudh] (12,551), a province in the Bengal Presidency, occupying the basin of the Gumti, Gogra, and Rapti Rivers, and stretching from the N. bank of the Ganges to the lower Himalayas; is a great alluvial plain, through which these rivers flow between natural embankments, affording irrigation by their marshes and overflows. The sole industry is agriculture; the crops are wheat and rice, which are exported by rail and river. The population is one of the densest in the world, the labouring classes being very poor. The only large town is Lucknow (273), on the Gumti. One of the earliest centres of Aryan civilisation, Oudh became subject to the empire of Delhi in the 12th century, but was an independent State for a century prior to its annexation by the British in 1856.
[Oudinot, Duke of Reggio], marshal of France, born at Bar-le-Duc; served with distinction under the Revolution and the Empire; led the retreat from Moscow, and was wounded; joined the Royalists after the fall of Napoleon, and died Governor of the Hôtel des Invalides (1767-1847).
[Ouida], the pseudonym of Louise de la Ramée, English novelist, born at Bury St. Edmunds; resides chiefly at Florence; has written over a score of novels, "Under Two Flags" and "Moths" among the best; b. 1840.