Parallela minora
Plutarch
Plutarch. Moralia, Vol. 4. Babbitt, Frank Cole, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1936 (printing).
When a war between the Tegeans and the Pheneans had continued for a long time, it was agreed to send triplet brothers to determine the victory by their fighting. The Tegeans accordingly chose to represent them the sons of Rheximachus, and the Pheneans the sons of Demostratus. When battle was joined, two of Rheximachus’s sons were slain. But the third, Critolaüs by name, by a stratagem succeeded in surviving his two brothers. For he devised the ruse of simulated flight, and so killed one after another of his pursuers. And when he came home all the rest rejoiced with him; but his sister Demodicê alone did not rejoice, for he had slain her betrothed, Demodicus. Critolaüs, smarting under such undeserved treatment, killed her. He was prosecuted for murder by his
mother, but was acquitted of the charge.[*](Cf. Stobaeus, Florilegium, xxxix. 32 (iii. p. 729 Hense).) So Demaratus in the second book of his Arcadian History.When the Romans and the Albans were at war, they chose triplets as their champions, the Albans the Curiatii, the Romans the Horatii. When the battle was joined, the Curiatii killed two of their opponents; but the survivor made use of simulated flight to help him, and killed one after another of his pursuers. Amid the universal rejoicing his sister Horatia alone did not rejoice with him; for he had slain her betrothed, Curiatius. So Horatius killed his sister.[*](Cf. Livy, i. 24-26.) This Aristeides the Milesian narrates in his Italian History.