It is not clear that this was ever played by the Dead: the listing for 19 May 1966 at the Avalon Ballroom is a mistake for Tastebud. It was played as an instrumental on 11 November 1970 with members of Hot Tuna, who also recorded this song. These lyrics are from a Lightnin' Hopkins version
Come back baby, baby please don't go
Well I love you, and I want the world to know
Come back baby
Let's talk it over
One more time
This old world wasn't made in one day
Come back baby, don't go away
Come back baby
Let's talk it over
One more time
You know it's been a long time since I saw you smile
Makes me think of the time you was a child
Come back baby
Let's talk it over
One more time
If you ain't coming back baby, please let me know
Then I won't have to worry about you not coming back no more
Come back baby
Let's talk it over
One more time