That is an interesting article, although a little difficult to read
Glade you like it...It's from an Archaeology Italian site, specific to the Samnites ; note that I used google translate and site is in Italian language.
The waters there are also associated with healing, which I see the article also connected to Mefitis, as well as spring and fertility, which all goes well with healing
sulfurous waters have in fact healing and therapeutic properties...
There are not specific references to Initiation into the Mysteries, but your association is interesting and of course there is always the Mysteries and esoteric aspect on these cults ; Virgilo explanation from the Eneide refers well to the concept of deity of Transition :the site of the Ansanto Valley where there is Acheron and the door to the underworld; the transition from life to death. I posted Virgilio verses on the previous page.
Very interesting. thanks for sharing REA
I'll post more Italic Deities..