“The King of Elfland’s Daughter,” by Lord Dunsany.
The young prince Alveric persuades a witch to make him a magic sword, so that he can fight the armies of Elfland and win the hand of the aforementioned daughter. The witch forges the sword out of seventeen “thunderbolts” dug from her garden; these are clearly intended to be meteorites, but Dunsany never actually comes out and says this, presumably because meteorites are a latter-day concept and therefore would seem anachronistic in such a setting.
So instead he describes the “thunderbolts” in a very roundabout way, as “cousins of Earth that had visited us from their etherial home,” “stormy wanderers,” “metals not sprung from Earth,” which floated on “paths of Space” until Earth captured them, etc., etc. They’re meteorites, get it? Meteorites!
Having established this, Dunsany goes on to describe the forging process. The witch blasts the metal with arcane runes of power, the fire leaps up “wild and green; and down in the embers the seventeen, whose paths had once crossed Earth’s when they wandered free, knew heat again as great as they had known, even on that desperate ride that brought them here.” Because they’re meteorites, see.
At last the metal is hot enough, and the magical fire vanishes in an instant, “leaving only a circle that sullenly glowed on the ground, like the evil pool that glares where thermite has burst.”
*WHAAA–??? Thermite?! * Dunsany, you cock! I got fricking whiplash from that! You craft a fantastic, eloquent scene full of magic and wonder and otherworldly beauty, and then shoot it to hell like that?! What was all that dancing around the concept of meteorites a minute ago, if you’re just going to blow the mood to bits anyway by mentioning goddamn *thermite? *
Ass.