I know this is an old thread, but i wanted to clarify the Ancelet issue mentioned. In the book "Traditional Music in Coastal Louisiana: The 1934 Lomax Recordings By Joshua Clegg Caffery", he states "anecdotal evidence suggests a link with an eigtheenth-century composition for guitar, written by either Frederico Moretti or Fernando Sor, the best-known classical guitarist of his day." (Ancelet 1991, p156) (Caffery, p52)