The Thistle & Shamrock: The Carrying Stream Hear how songs like "Barbara Allen," performed here by Dolly Parton with Mairéad Ní Mhaonaigh and Altan, flow freely between artists on both sides of the Atlantic Ocean.
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The Thistle & Shamrock: The Carrying Stream

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The Thistle & Shamrock: The Carrying Stream

The Thistle & Shamrock: The Carrying Stream

The Thistle & Shamrock: The Carrying Stream

  • <iframe src="https://www.npr.org/player/embed/456686990/456692009" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Dolly Parton. Brendan Hoffman/Getty Images hide caption

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Brendan Hoffman/Getty Images

Dolly Parton.

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It once took centuries for a ballad like "Barbara Allen" to work its way through the British Isles and across the Atlantic. Now, music flows freely back and forth as artists on both sides of the ocean explore and fuse flavors from Celtic, Appalachian and old-time music.

This week, hear from musicians who exemplify this exchange, including Dolly Parton, John Doyle, Jean Ritchie and Anaïs Mitchell.