Just happened across an excellent resource which includes audio files and lyrics for close to 400 Old Time & mountain music songs. Absolutely essential, and they also offer a bunch of products to help you learn these tunes. Totally cool! While most (if not all?) of these songs are in the Public Domain (like all my songs, incidentally) I 100% see the value in buying quality recordings, lyrics and chords for stuff like this - as piecing it all together via the internet is time-consuming and annoying.