I do! [Gravity was not just an astrologian spell, after all. She's followed along so far, eyes bright, but not wanting to interrupt. She knew about gases, but not that they actually had names and that sort of thing--well, save for ceruleum, but that was different.]

No, you have to pressurize things if you go underwater, though, too--or have magical means to not be crushed and be able to breathe. It's the same principle, yes? Just no magic?

[Because Sarai realizes, on Hydaelyn they do via magic some things that Peter's people do without it. They're a bit like the Garleans that way--and the thought disturbs her briefly, but if his people just do without magic, maybe they haven't been afflicted by the Garleans' madness. He was too sweet to think that of him.]

Go on, tell me more!