[Ariel looks from Richard, up to the "candle" and then back down. He nods very sagely.]

Excellent advice, my fellow scholar. [A beat, before Ariel lowers his voice. He doesn't want to startle his new friend with this very important information.]

I've heard tell that they're made of lightning. In a manner of speaking, of course. Harnessed electricity, used to power towns! Can you believe it?