According to Hesiod's "Theogony", the "terrible" and "lawless" Typhon, "was joined in love to the maid with glancing eyes" and she bore "fierce offspring". First there was Orthrus, the two-headed dog who guarded the Cattle of Geryon, second Cerberus, the multiheaded dog who guarded the gates of Hades, and third the Lernaean Hydra, the many-headed serpent who, when one of its heads was cut off, grew two more. The "Theogony" mentions a second ambiguous “she” as the mother of the Chimera (a fire-breathing beast that was part lion, part goat, and had a snake-headed tail) which may refer to Echidna, though possibly the Hydra or even Ceto was meant instead. Hesiod next names two more descendants of Echidna, the Sphinx, a monster with the head of a woman and the body of a winged lion, and the Nemean lion, killed by Heracles as his first labor. According to Hesiod, these two were the offspring of Echidna's son Orthrus and another ambiguous "she", read variously as the Chimera, Echidna herself, or even Ceto. In any case, the lyric poet Lasus of Hermione (6th century BC), has Echidna and Typhon as the parents of the Sphinx, while the playwright Euripides (5th century BC), has Echidna as her mother, without mentioning a father. While mentioning Cerberus and "other monsters" as being the offspring of Echidna and Typhon, the mythographer Acusilaus (6th century BC) adds the Caucasian Eagle that ate the liver of Prometheus. Pherecydes also names Prometheus' eagle, and adds Ladon (though Pherecydes does not use this name), the dragon that guarded the golden apples in the Garden of the Hesperides (according to Hesiod, the offspring of Ceto and Phorcys).