Errr... the correct title is "Chanson des escargots qui vont à l'enterrement" (no "deux")...
Brassens was from Sète...
... and "not least" is that all Prévert's poetry and Brassens' songs have a copyright, Prévert died in 1977 and Brassens in 1982, so +70 = end of 2047 and 2052 respectively.