The first volume of this pair, , originally published in 1948, investigates the questions arising out of the use of the term Bantu. It establishes and illustrates the criteria used in identifying languages as members of the Bantu family. The technique used in classification is described and its results shown in the form of a series of descriptive classifications of each of the principal areas. As well as the map (not included in the volume due to modern methods of reproduction, but available to view on routledge.com), there is a complete list of languages classified in their groups. The second volume, published in the same year, discusses a question which for many years was the subject of protracted controversy, namely the dispute between the conjunctivist and the disjunctivist, with regard to word division. This pamphlet discusses word division from a different angle, and solves the problem in a more conclusive way.