[Sadie snorts a little when he mentions the sun, but doesn't get into why because that's spoilers.]

Oh, it's quite explosive when the Greeks and Egyptians meet. Just ask Percy about it. [ha ha.] Or you can ask me, I guess, so long as you solemnly swear to keep everything I tell you secret, especially from my brother if he ever turns up. I really don't need a lecture from him about the sanctity of the House's mysteries and all that nonsense. Not that he has much of a leg to stand on, really, since this certainly isn't New York, but I'm sure he'd try because that's what annoying big brothers do.

[somewhere back in Brooklyn Carter has a sneezing fit, probably]