Some stories stand the test of time: Shakespeare's plays, the fairy tales of the Brothers Grimm, and the Child ballads.
If you're unfamiliar with them, they're not for children. They're Scottish and English folk songs from the 17th and 18th centuries and earlier. They're named after Francis James Child, the Harvard professor and folklorist who collected them.
Her voice is soft and sweet, her guitar work deft and evocative, but Anaïs Mitchell is a songwriting storyteller first and foremost. Robbed of a gift for melody and poetry, Mitchell would probably (and may yet) write some tremendous novels.