sentences:  The purpose of this nail burning and bondage is to ensure that the dead person will not dig his way out of his grave, and, returning, be capable of wielding his spears.The overburden of earth dug out to excavate the burial site must not be used to fill the grave, which is otherwise covered with bark, rushes and sticks.A fire is then kindled, his worldly goods, including his broken spears, are then laid nearby, and trees are scarred with rings to mark the site.