[374] It is noted by Herodotus and others as a remarkable fact, that no mules were ever bred in the Eleian territory: an Eleian who wished to breed a mule sent his mare for the time out of the region. The Eleians themselves ascribed this phænomenon to a disability brought on the land by a curse from the lips of Œnomaus (Herod. iv. 30; Plutarch, Quæst. Græc. p. 303). [375] Paus. v. 1, 1; Sophok. Elektr. 508; Eurip. Orest. 985, with Schol., Plato, Kratyl. p. 395. Pelops had a numerous issue by Hippodameia: Pittheus, Trœzen and Epidaurus, the eponyms of the two Argolic cities so called, are said to have been among them: Atreus and Thyestês were also his sons, and his daughter Nikippê married Sthenelus of Mykênæ, and became the mother of Eurystheus.[376] We hear nothing of the principality of Pisa afterwards: the Pisatid villages became absorbed into the larger aggregate of Elis, after a vain struggle to maintain their separate right of presidency over the Olympic festival. But the legend ran that Pelops left his name to the whole peninsula: according to Thucydidês, he was enabled to do this because of the great wealth which he had brought with him from Lydia into a poor territory. The historian leaves out all the romantic interest of the genuine legends—preserving only this one circumstance, which, without being better attested than the rest, carries with it, from its commonplace and prosaic character, a pretended historical plausibility.[377] [376] Apollod. ii. 4, 5. Pausan. ii. 30, 8; 26, 3; v. 8, 1. Hesiod. ap. Schol. ad Iliad. xx. 116. [377] Thucyd. i. 5.