Thanks for your responses. I know the Stanley Brothers borrowed from traditional sources much like Bill Monroe and the Carter Family did.

I know when I published my bluegrass book with Mel Bay several songs were copyrighted that were in fact from earlier sources, sources BMI is not familiar with.

For example Lulu Walls was (and still is) copyrighted by the Carter family but was in fact in print in 1888. So their copyright is not valid.

LYRIC ADD: This Weary Heart You Stole Away (Wake Up, Sweetheart)

I wait for you dear all night long
It seems you never do get home
I fall asleep at the break of day
Just to drive these awful blues away

Wake up sweetheart the night has passed
You slept your troubles all away
Get ready now to love again
This weary heart you stole away

I heard you crying in your sleep
You said you found somebody new
So I'll live on and just pretend
I could never love no one but you

How can you treat me like you do
You know I've never done you wrong
My heart will always worship you
But still each night I'm left alone

Recorder by Stanley Brothers also Ricky Skaggs