Kissi was used both singularly and in bundles
of 20 to buy kola nuts, fabric, tobacco, wives
and slaves. They are said to have a soul.
When one of them breaks, the soul escapes
and the iron piece does not have its value any
more. Only the witchdoctor of the village
(the blacksmith) has the power to reincarnate
the soul by rejoining the pieces together.