Pausanias Description of Greece 1.15.1

[1]
  As you go to the portico which they call painted, because of its pictures, there is a bronze statue of Hermes of the Market-place, and near it a gate. On it is a trophy erected by the Athenians, who in a cavalry action overcame Pleistarchus, to whose command his brother Cassander had entrusted his cavalry and mercenaries. This portico contains, first, the Athenians arrayed against the Lacedaemonians at Oenoe in the Argive territory. ¹ What is depicted is not the crisis of the battle nor when the action had advanced as far as the display of deeds of valor, but the beginning of the fight when the combatants were about to close.

[1] As one goes to the portico [ stoā] that they call painted [ poikilē], because of its paintings [ graphai], there is a bronze statue of Hermes of-the-Marketplace [ agoraios], and near it a gate [ pulē]. Placed over it [= the gate] is a trophy [ tropaion] erected by the Athenians, who in a cavalry action overcame Pleistarkhos, to whose command his brother Kassandros had entrusted his cavalry and mercenaries. This portico [ stoā] contains [wall paintings that represent], first, the Athenians arrayed against the Lacedaemonians at Oinoe in the Argive territory. What has been painted [ graphesthai] is not the critical-point [ akmē] of the struggle [ agōn] nor when the action [ ergon] had advanced as far as the display [ epideixis] of deeds of valor, but the beginning of the fight when the combatants were about to close in on each other.