No. Title Date
1 Hausa grammar : with exercises, readings, and vocabularies
2 Die Hausasprache : grammatik (Deutsch) und systematische geordnetes Wörterbuch : Hausa-Deutsch-Französisch-English
3 A Hausa reading book : containing a collection of texts reproduced in facsimile from native manuscripts, arranged for the use of beginners and advanced students, with transliterations into Roman characters, translations, notes, &c.
4 Lehrbuch der Hausa-Sprache.