This divination object is called
itwoom or "rubbing oracle" by the
Bushoong, the royal members of the
Kuba people. The diviner interrogates
the oracle while rubbing a small
wooden peg along is back. The
answer is affirmative when the
peg sticks to the oracle. The
oracle is consulted to diagnose
illness as well as to single out
criminals. It is thought to be
especially effective at identifying
thieves.