Been busy, here, but hopefully I'll get there soon.
Short version, though, if you can't find the renewal, the significant fear with licensed works (which I'd never be able to figure out, obviously) is that they're direct adaptations of something that's still covered by copyright. While it's technically still public domain, who wants to have the discussion with users that the book is public domain but almost nothing inside it is, or the equivalent discussion with the owners.