Hyperides, one of the ten famous Attic orators, born probably about 395 B. C, died in AEgina in 322. He was a pupil of Plato in philosophy, of Isocrates in oratory, began his career as an advocate, and was an associate of Demosthenes as leader of the anti-Macedonian party. In 358 he and his son equipped two triremes at their own expense to join the expedition against Euboea. He displayed an equal interest in the patriotic cause on an embassy to Rhodes (346), in the expedition against , Byzantium (340), as ambassador with Demosthenes to Thebes after the capture of Elatea by Philip (338), and after the battle of Chaero-nea, when he proposed, by a union of the citizens, resident aliens, and slaves, to organize a desperate resistance to Philip. For his efforts on the last occasion he was prosecuted on an indictment for illegal proposition, but was acquitted. Of his defence there remain only the words: "The Macedonian army darkened my vision; it was not I that moved the decree, but the battle of Chaeronea." The affair of Harpa-lus (324) for the first time broke his friendly relations with Demosthenes, against whom he appeared as public prosecutor. On the report of Alexander's death (323), it was chiefly by his exertions that the confederacy was formed which brought about the Lamian war.

He fled after the battle of Crannon to AEgina, and was pursued and put to death by the emissaries of Antipater. The number of orations attributed to him was 77, but the ancient writers rejected 25 of them as spurious. They agree in extolling his genius, and commend him for almost every excellence of style. Until lately only unimportant fragments of his orations were known to have been preserved. In 1847 A. C. Harris, an English resident of Alexandria, purchased near the ruins of Thebes some fragments of papyrus written over with Greek, which were parts of the oration of Hyperides against Demosthenes on the charge of having been bribed by Harpalus. He published a facsimile of them in 1848. They were edited by Churchill Babington, with an introduction and commentary, in 1850. Another Englishman, Joseph Arden, procured at the same place and nearly at the same time other fragments of papyrus, which were found to contain a large part of his speech for Lycophron, prosecuted for adultery, and his complete oration for Eux-enippus, charged with making a false report of the oracle of Amphiaraus. These were edited by Mr. Babington in 1853. Another traveller, Mr. Stodart, brought from Egypt in 1856 another collection of papyrus fragments, among which were a large part of the funeral oration on Leosthenes and the Athenian soldiers who perished in the Lamian war.

This was published by the same editor in 1858. His orations have been republished in Germany by Bockh, Kayser, and others, and in Paris in Didot's Bibliotheca Graeca. The funeral oration has been edited by Cobet (Leyden, 1858).