Here's the Jimmy Martin recording: https://www.youtube.com/watch?v=xIHyWAH8Z5M

Hugh Laurie: https://www.youtube.com/watch?v=EE7FHPPCCRA

Leadbelly: https://www.youtube.com/watch?v=DGyOJCdRoQc

Odetta: https://www.youtube.com/watch?v=F9R1UhCSyN8

Mississippi Joe Callicott: https://www.youtube.com/watch?v=okxX5_e8Ufk

Pink Anderson: https://www.youtube.com/watch?v=osXrF_jMALU

Will the Circle Be Unbroken album: https://www.youtube.com/watch?v=xviTl_SabPo

J.D. Crowe & the New South: https://www.youtube.com/watch?v=r_GECm8BYk8

Tony Rice, Bela Fleck, Jerry Douglas, Sam Bush, and Mark O'Connor: https://www.youtube.com/watch?v=WsXPzrTero4

Doc Watson: https://www.youtube.com/watch?v=PahAfWq-2z8

Libby Rae Watson: https://www.youtube.com/watch?v=MB2w2Bb51Rs