Story link: 'The Devil in Gaylord's Creek' -- Sarah Monette

The Devil In Gaylord's Creek, by Sarah Monette.

She's a tattooed, sword-wielding Southern belle! He's a fussy guy in tweed who insists on proper terminology! Together they fight crime Weird Shit!

About twenty-five miles out from Gaylord’s Creek, we stopped to settle a dust witch.

Dust witches are stupid things, and I wanted to push on, but Francis insisted. He gave me the lecture on how little evils get to be big evils if you leave them alone long enough, blah blah blah, no one else to do it, got to do your duty if you want to carry the sword, and I finally said, “All right already!” just to get him to shut the fuck up.