The site is updated with some new sound recordings added, and the link above is inactive. My route is as follows:

(1) The National Park Service (Home Page)

(2) Click on "Visit Your Parks", and THIS PAGE appears.

(3) Pull down the menu "--Select a Park to Visit--", and select "Edison National Historic Site." THIS PAGE appears.

(4) Click on "inDEPTH" icon, and THIS appears.

(5) Go on to "Edisonia", and then to "SOUND" (THIS IS THE PAGE). "Barbara Allen" is at "Country & Anglo-American Folk Songs."