I have a book entitled "Blue Grass Songbook" by Peter Wernick (Oak Publ.) which gives the title as "Roll in my Sweet Baby's Arms" but usually I hear it as Rollin in...

The author is the ubiquitous "Traditional" and the comment below the song says:

"A blue grass standard introduced by the Monroe Brothers, this song is now performed bye everyone from parking lot pickers to Buck Owens to Leon Russell."

Discography
Flatt and Scruggs, Pickwick 6093
Lester Flatt, Bluegrass Festival/RCA
The Stanley Brothers, The Legendary Stanley Brothers,Vol1/Rebel
The Monroe Brothers, Feast Here Tonight/RCA

Frank Phillips