In ancient myth, the severed head stood for Wisdom. In story after story, the severed head speaks and gives counsel.
A sick man, a story-teller, dying in a work-camp, fears for the children he’ll leave behind in a harsh world.
His last wish is that his head be cut off, and carried by his children on their long walk home to the grandmother they have never seen.
When they are tired, despairing, threatened, the head opens its eyes – and tells stories. Words have power. Stories can be spells.
And here's a link to a short essay on severed heads in folk-tale, which you may enjoy...
And the book can be found here.