Havana, thanks for the links, interesting information!
You are welcome.Hope you find it useful.
Another thing that might possible be a factor of how the mafia or camorra spread to Calabria ,Apulia,etc, might be according to their dialects,or language.
This might not mean much,but the dialects of Campania,Molise,Soyh Abruzzo,South Lazio,Basicalata,upper Apulia,Northern Calabria are said to be part of the Neapolitan Language
According to Wikipoaedia, Dialects of Southern Calabria,Southern Apulia,and Sicily are said to be part of the Sicilian Language ,along with a dmall area in Campania,maybe around Amalfi or in Salerno somewhere
