Dictionary.net

An Attic orator; about 450-380 B. C. Of his anciently accredited 425 orations only 233 were authentic; 31 are still extant, but some even of these, and considerable fractions of others, are suspected to be spurious. All but one of these were written for other persons to deliver in courts or public assemblies; the exception is a speech made by him in court for the conviction of his brother's murderer. They are all written in the purest Attic, and the narration and arguments are managed with extraordinary skill.