This rough transcription is from a YouTube video by the Jumpsteady Boys. Rafe Stefanini was the fiddler. The A and B parts are doubled in this version.
West Virgina fiddler Edden Hammons
I’m sure Rafe got this tune from the great 1947 recording of Edden Hammons.
You can hear it here: https://oldtimeparty.wordpress.com/tag/edden-hammons/
And there is lots of information about the tune there, too.
They say it is a variant of "The Balckbird" and was used as a "dead march" for funerals.
A variant of the Blackbird, yes, but listening to Edden Hammons I was first struck by strong echoes of the air to the Paddy Tunney song "The Green Fields of Canada." So it would seem that that air is also derived from the Blackbird, something I hadn’t realized despite being very familiar with both tunes. Thanks!