Parallela minora

When a Plague had overspread Sparta, the god gave an oracle that it would cease if they sacrificed a noble maiden each year. Once when Helen had been chosen by lot and had been led forward adorned for the sacrifice, an eagle swooped down, snatched up the sword, carried it to the herds of cattle, and let it fall on a heifer; wherefore the Spartans refrained from the slaying of maidens.[*](Cf. Lydus, De Mensibus, 147 (p. 165 Wünsch); Tzetzes, Scholia on Lycophron, ii. 63 and 92 ed. Scheer. For human victims at Sparta cf. Porphyry, De Abstinentia, ii. 55.) So Aristodemus in his Third Collection of Fables.

When a Plague had gained a wide hold on the city of Falerii, and many perished of it, an oracle

was given that the terror would abate if they sacrificed a maiden to Juno each year. This superstitious practice persisted and once, as a maiden chosen by lot, Valeria Luperca, had drawn the sword, an eagle swooped down, snatched it up, and placed a wand tipped with a small hammer upon the sacrificial offerings; but the sword the eagle cast down upon a certain heifer which was grazing near the shrine. The maiden understood the import: she sacrificed the heifer, took up the hammer, and went about from house to house, tapping the sick lightly with her hammer and rousing them, bidding each of them to be well again; whence even to this day this mystic rite is performed. So Aristeides in the nineteenth book of his Italian History.