What is your take on the nature of the hollow rock Whiners produce? The books have various references to it and mention some possibilities but there isn't anything concrete (I think).
I'm quite happy for details to be left up to each group but we are in the process of saving a group of Whiners and I'll need to figure out the details sooner rather than later. So I was wondering whether any of you might have some ideas that I could use as inspiration (or steal shamelessly).
I'm particularly interested in the potential mutual benefit Whiners and Stone Singers might derive from a cultural exchange. This is hinted at in Vale of the Dead but no explanation is given.