The Green Man

While we're talking about the Green Man, I'll take the opportunity to ask a question which has been bugging me about the New Sun for a long time. This may be something people have already figured out, but I couldn't find it mentioned by googling on the archives here. I don't have the book handy, but when Agia and the Green Man rescue Severian, doesn't the Green Man promise Severian he'll look for another time when he was imprisoned, and release him? When does he do this? The Green Man does seem to show up earlier when Severian is imprisoned in the Antechamber, but this doesn't qualify, because Severian gets out by himself (with some help from Thecla). -- Stone Ox