Vitae philosophorum
Diogenes Laertius
Diogenes Laertius. Hicks, R. D., editor. Cambridge, MA.: Harvard University Press; London: William Heinemann Ltd., 1925.
Archytas of Tarentum, son of Mnesagoras or, if we may believe Aristoxenus, of Hestiaeus, was another of the Pythagoreans. He it was whose letter saved Plato when he was about to be put to death by Dionysius. He was generally admired for his excellence in all fields; thus he was generalissimo of his city seven times, while the law excluded all others even from a second year of command. We have two letters written to him by Plato, he having first written to Plato in these terms:
Archytas wishes Plato good health.