"Parker Brown" is a contemporary old-time style reel in D. It was composed by Brian Duffy.
This version comes from a Grayson City, VA fiddler Jerry Correl by way of April Verch.
The banjo tablature is from John Letscher.
There is a version by Adam Hurt and friends on youtube.
It seems to be derivative of "Susannah Gal", in the A part.