User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-11492600-20130702221941/@comment-3146930-20130708040421

I remember the story, but considering Chiron kind of...dies in that version, you have to wonder. The only real good explanation is that either that story about Hercules killing him is fake (in the PJ series anyway) and Chiron just used it as a cover to train new demigods in secret.