In the vast countries which stretch between Kordofan and the Bahr el Ghazal Province in the east, Tripolis in the north, Lake Chad and the north-western frontier of the Cameroons in the west, and a line in the south which is formed by the southern border of the colony Ubangui-Chari, linguistic research work is still only in its beginnings. The languages spoken in the above regions which comprise the highlands of Tibesti, Borku, Enedi, and the old kingdoms of Darfor, Dar Banda, Wadai, Bagirmi, Bornu, Adamawa, and their neighbouring countries, are still to-day the least known of all the languages of Africa. This part of Central Africa lies far from the animated coastal areas and was occupied by European Powers only in a comparatively recent period. But the study of languages of newly occupied countries is not the first object of a Native Administration, especially where Arabic is a first means of communication; and Arabic plays an important role indeed in some parts at least of Central Africa. Besides the use for purposes of administration, linguistic research work is linked to two undertakings: the missions and native education. Missionary work is especially important in pagan countries, but may have little or no influence in a large part of Muhammadan Central Africa.