A short while back I posted about Robert Mitchum's dedication and skill and authenticity with Calypso, and how he actually tried to convince director Charles Laughton to incorporate some tunes into the script to "balance" the mood.
Now my research has led me to this lost reel of footage in which Laughton indulges Mitchum and actually does incorporate a song from his album of authentic Calypso hits entitled "Calypso.....is like so."