Nsibidi is a writing system of
the Ejagham people of Nigeria. It is seen on tombstones, secret
society buildings, costumes, ritual fans, headdresses, textiles,
and in gestures, body and ground painting.
(Source: charts for Nsibidi and
the Vai syllabary are from Maude Wahlman's book Signs and
Symbols: African Images in African American Quilts.)