The liner notes to the "new" Rounder cd Louisiana Cajun and Creole Music: The Newport Field Recordings has a little area where Austin Pitre describes how he took Douglas Bellar's La Valse de la Prison from 1929 and created a "turn" or bridge for it, making it something new. He did this in the 1950s and recorded it for Swallow records, hence the claim by Swallow to hold copyright. At most, it should maybe be a copyright on the sound recording, NOT the lyrics since they're pretty straight from Bellar. People today play Les Flammes d'Enfer as in Pitre's version.