Some of the wonderful music - both old and new-minted - that is available these days is certainly incentive to keep the poetic gaelic languages alive! Bob, I have a book called "Encyclopedia of Celtic Wisdom" which seems to be well-researched and free of the new-age influence; No Wicca, nothing "Neo-pagan", just an examination of old writings (OK, there is a bit of Robert Graves, but they simply present some of his work, they don't tout it), many of their sources extremely old. They (the authors, Caitlin and John Matthews) seem to believe that Samhain is the Celtic new year; they don't actively defend that belief, so I don't know if this is an assumption on their part, but digging into the old legends and lore as deeply as they do, I'd think they'd have noticed if such an assumption was wrong.