IBO  , a

district of British West Africa, on the lower Niger immediately above the delta, and mainly on the eastern bank of the river . The chief town, frequently called by the same name (more correctly Abo or Aboh), lies on a creek which falls into the main stream about 150 M. from its mouth and contains from 6000 to 8000 inhabitants . The Ibo are a strong well-built Negro race . Their women are distinguished by their embonpoint . The language of the Ibo is one of the most widely spoken on the lower Niger . The Rev . J . F . Schon began its reduction in 1841, and in 1861 he published a grammar (Oku Ibo Grammatical Elements, London, Church Miss . Soc.) .