[Nepos, Cornelius], Roman historian, born at Pavia; was a contemporary and friend of Cicero; was the author of several historical works, no longer extant, and the one still extant ascribed to him, entitled "De Viris Illustribus," is believed to be an abridgment of an earlier work by him.

[Neptune], the chief marine deity of the Romans, and identified with the Poseidon of the Greeks, is represented with a trident in his hand as his sceptre.

[Neptune], the remotest planet of the solar system at present known; it is twice as far distant from the sun as [Uranus] (q. v.) is, deemed before its discovery the remotest; its diameter is four times greater than that of the earth, and it takes 60,126 days to revolve round the sun, accompanied by a solitary satellite; it was discovered in 1846 by [Adams] (q. v.) and [Leverrier] (q. v.), who were guided to the spot where they found it from the effect of its neighbourhood on the movements of Uranus.

[Nerbudda], or Narbada, a sacred river of India; has its source in the Amarkantak plateau of the Deccan, and flows westward, a rapid body of greenish-blue water, through the great valley between the Vindhya and Satpura Mountains, reaching the Gulf of Cambay after a course of 800 m., the last 30 of which are navigable.

[Nereides], nymphs of the Mediterranean Sea, daughters of Nereus, 60 in number, and attendant on Poseidon.

[Nereus], the god of the Mediterranean Sea, the son of Pontus and Gaia, the husband of Doris, and father of the Nereides, represented as a sage, venerable old man.

[Neri, St. Philippo di], Italian priest, born at Florence, of noble family; founder of the Congregation of the Oratory; was known from his boyhood as the Good Pippo, and he spent his life in acts of devotion and charity (1515-1592). Festival, May 26.

[Nero], Roman emperor from A.D. 54 to 68, born at Antium, son of Cn. Domitius Ahenobarbus and of Agrippina, daughter of Germanicus; after the murder of Claudius, instigated by Agrippina, who 4 years previously had become the emperor's wife, Nero seized the throne, excluding Britannicus, the rightful heir; during the first 5 years of his reign his old tutors, Seneca and Burrus, were his advisers in a wise and temperate policy, but gradually his innate tendency to vice broke through all restraint, and hurried him into a course of profligacy and crime; Britannicus was put to death, his mother and wife, Octavia, were subsequent victims, and in 64 numbers of Christians suffered death, with every refinement of torture, on a trumped-up charge of having caused the great burning of Rome, suspicion of which rested on Nero himself; a year later Seneca and the poet Lucan were executed as conspirators, and, having kicked to death his wife Poppæa, then far advanced in pregnancy, he offered his hand to Octavia, daughter of Claudius, and because she declined his suit ordered her death; these and many other similar crimes brought on inevitable rebellion; Spain and Gaul declared in favour of Galba; the Prætorian Guards followed suit; Nero fled from Rome, and sought refuge in suicide (37-68).

[Nerva], Roman emperor from 96 to 98, elected by the Senate; ruled with moderation and justice; resigned in favour of Trajan, as from age unable to cope with the turbulence of the Prætorian Guards.