One of the theories in archaeology for explaining the henges and standing stones scattered across the british isles is that they are visual statements of ownership, oftentimes remains are found buried underneath and the dead are also laid to rest in the foundations of homes, ostensibly to watch over their descendants. This got me thinking, with the importance of souls in the world of Eternity perhaps the more primitive societies (and perhaps even the civilised ones) might see it as pefectly reasonable to bind the willing soul of a family member to their home and hearth.
Acting as a lorekeeper and a living reminder of their ancestry, such trapped souls could be enormously important to a community, or perhaps simply stand amid ruins wailing for their long lost children. Or such imprisonment might drive them mad, and they beg to be released from their duties.