Personally, I tend to agree with Dave Lebling, in that the Cumaean is the Sibyl of Cumae. Gerry's claim that, if the old witch was alive in ancient Rome, she wouldn't really need her "friend" in Formalhaut, is very compelling. It is not required, though, that the Cumaean be continuously alive since antiquity, in order for her to be the Sibyl. If the Botanic Gardens function as a gateway in space-time, the witch could simply pass from antiquity to the very far future without needing to be alive all this time. Therefore she might have "missed" the Apu-Punchau period, and not be able to raise him. It is also possible that, since Severian was probably the "real" inspiration behind the Incan god Inti, he might have become Apu-Punchau in a mythological age much earlier than the beginning of the Incan empire, and therefore maybe even before ancient Rome.<div>
<br></div><div>As of Severian's relation with the Cumaean, I'm inclined to believe that it goes deeper than the obvious. First, because she is clearly one of the witches from the Witches' Tower, and therefore belonged to what seems to be the guild closest to the torturers in the citadel, if that indeed is a guild at all, which I doubt. Second, because although Severian is obviously a Christ figure, he is also a Sun God, what with his being a sun, taking power from a sun, and all that. He may be particularly identifiable as Apollo, for his good looks, sexual appetite, healing powers, and love of tales. I also seem to remember something about the torturers apprentices having sex with the witches, though I don't recall where it was written. But not Severian. He did have a strange encounter with the witches, while still an apprentice, but it was not sexual. All that resonates beautifully with the legend about the Cumean Sibyl, in which Apollo gives her longevity in exchange for sex, but withholds youth when the prophetess refuses to sleep with him, eventually making it necessary for her to live in a jar, on account of her withered body. Didn't the Mandragora say that it was the Autarch who created it?<div>
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