This book "supplies a vocabulary of English words and idiomatic phrases 'arranged … according to the ideas which they express'. The thesaurus, continually expanded and updated, has always remained in print, but this reissued first edition shows the impressive breadth of Roget's own knowledge and interests."
Dr Crabb's 1965 study of the Ekoid Bantu languages of Ogoja examines these related languages as a basis of comparative historical research. He has chosen fourteen of these Ekoid languages as representative of a number of languages in the north-west area of Nigeria bordering on the Bantu language area, whose status as Bantu languages has been open to question. This study is based on extensive field work and presents comparatively the phonologies and selected vocabularies of the languages.