Roger, I've got two versions of the lyrics I could post. Those below are the earliest version I can find, recorded by Dick Justice, in 1929, under the title 'BLACK DOG BLUES'. If they're not the ones you want I'll post a different version by Bayless Rose.

Brian

Old black dog when I'm gone, lord, lord.
Old black dog when I'm gone.
When I come back with a ten dollar bill,
And it's, "Honey, where you been so long?"

My daddy, he's a gambler,
He taught me how to play.
Told me to bet my money,
On Ace, Deuce, Jack and Tray.

Old black dog when I'm gone, lord, lord.
Old black dog when I'm gone.
When I come back with a ten dollar bill,
And it's, "Honey, where you been so long?"

Been all around Kentucky,
The state of old Tennessee.
Anywhere I hang my hat,
It'll be home sweet home to me.

Old black dog when I'm gone, lord, lord.
Old black dog when I'm gone.
When I come back with a ten dollar bill,
And it's, "Honey, where you been so long?"

See the train a-coming,
She is packing my casket, lord
Going to the graveyard,
Where the grave will be my home.

Old black dog when I'm gone, lord, lord
Old black dog when I'm gone.
When I come back with a ten dollar bill,
And it's "Honey, where you been so long?"