Note 878 — Chapter XII · THE SWORD IN ANCIENT ROME; THE LEGION AND THE GLADIATOR.
Reading edition
Athenæus (iv. 41) relates from Hermippus and Ephorus that the Mantineans were the inventors of Gladiatorism proper (μονομαχοῦντες), suggested by one of their citizens, Demus or Demonax, and that the Cyreneans followed suit.