Philip!!! Guess what I found!!! On a website about the Carter Family, there is a real audio clip of them playing and singing "Last Night While I Lay Sleeping". It sounds like what you are looking for. It's on Rounder Records, so I'm sure someone out there reading this forum has it to transcribe. The audio clip has them playing and it ends after the first two lines of lyrics... "Last night while I lay sleeping, last night while in a dream".

http://www.rounder.com/rounder/sounds/roun/1/1067.ra

Alice in Montana