Another set of lyrics is given in The 12-String Guitar As Played by Leadbelly (Oak, 1956, 1968, p. 47) by Julius Lester and Pete Seeger. There're two versions; "he seldom played the same song the same way twice." (p. 48)

ROBERTA

Oh, Roberta, tell me how long, how long.
Oh, Roberta, tell me how long, how long.
You ought not keep me down here baby, singing this same ol' song.

I'm down on the river, setting down on the ground (2x)
I'm gonna stay right here, until that steamboat come down.

Way up the river, just as far as I can see (2x)
I thought I'd find my old time used to be.

She's a brownskin woman, got long black wavy hair (2x)
That woman look so good, baby, she can lead me 'most anywhere.

I'm going to the station, talk to that chief of police (2x)
Tell him that Roberta quit me; I can't see no peace.

Oh, Roberta, don't you hear me calling you (2x)
I just got one more thing, I want to do.

~Masato