Who is the American musician and singer who performed a version of the traditional English folk song "The Cuckoo" and began his performance career at Southern Appalachian medicine shows?
The Cuckoo (song): "The Cuckoo" (Roud 413) is a traditional English folk song, also sung in the USA, Canada, Scotland and Ireland. The Cuckoo (song):  An early notable recorded version was performed by Appalachian folk musician Clarence Ashley with a unique banjo tuning. Clarence Ashley:  He began performing at medicine shows in the Southern Appalachian region as early as 1911, and gained initial fame during the late 1920s as both a solo recording artist and as a member of various string bands.
Clarence Ashley