There actually are three original tracks, Joe.

First, the Mento (Calypso) Marianne-
http://www.mentomusic.com
Mento Music, under Harry Belafonte, has the following:
"A good number of Harry Belafonte's "calypso" songs are part of the Jamaican folk/mento repertoire:
(a list of 23 songs follow, which includes-
"Marianne (part of the mento repertoire, but originally a calypso song))."

Looking into his complete repertoire, there are two Marianne original tracks and a third song, Mary Ann.

http://www.belafontetracks.ca/original_tracks.htm
lists 525 tracks for Belafonte.
Two Marianne tracks are listed:
Marianne (Fare You Well) Eaton A31 - RCA-LSP-4301; "Belafonte By Request"
Marianne (Sifting Sand) Eaton A35 - RCA-VPSX-6077; "Belafonte ... Live!"
Marianne (Sifting Sand) Eaton A37 - Victor RCA-9101/9102; "Belafonte Concert in Japan."

The last three entries indicate that there are two songs titled "Marianne.".

Joe has posted the lyrics to the "Fare You Well" song.

The third song is, Mary Ann (Well Oh) Ray Charles A9 - RCA-LOP/LSO-1006/LSP-1972; "Belafonte Sings The Blues."