Black Martyrs. by the Rev. J. P. Thoonen. London: Sheed & Ward, 1941. Pp. Xviii + 302. 12s. 6d. Net. Colin P. Groves • 1948
Akiga's Story: The Tiv Tribe as seen by one of its Members. Translated and annotated by Rupert East. 1939. London: Oxford University Press; for the International Institute of African Languages and Cultures. Pp. xv + 436. Illustrated. Map. 21s. Colin P. Groves • 1940