Pausanias Description of Greece 6.16.8

[8]
  Demosthenes the Lacedaemonian won an Olympic victory in the men's foot-race, and he dedicated in the Altis a slab by the side of his statue. The inscription declares that the distance from Olympia to another slab at Lacedaemon is six hundred and sixty furlongs. Theodorus gained a victory in the pentathlum, Pyttalus the son of Lampis won the boys' boxing-match, and Neolaidas received a crown for the foot-race and the race in armour; all were, I may tell you, Eleans. About Pyttalus it is further related that, when a dispute about boundaries occurred between the Arcadians and the Eleans, he delivered judgment on the matter. His statue is the work of Sthennis the Olynthian.

[8] Demosthenes the Lacedaemonian won an Olympic victory in the men’s foot-race, and he dedicated in the Altis a slab by the side of his statue. The inscription declares that the distance from Olympia to another slab at Lacedaemon is six hundred and sixty furlongs. Theodoros gained a victory in the pentathlon; Pyttalos the son of Lampis won the boys’ boxing match, and Neolaidas received a garland for the foot race and the race in armor; all were, I may tell you, Eleians. About Pyttaloss, it is further related that, when a dispute about boundaries occurred between the Arcadians and the Eleians, he delivered judgment on the matter. His statue is the work of Sthennis the Olynthian.