In March, 1893, at the request of the Rev. Frank F. Ellinwood, D.D., LL.D., I wrote and read, before the American Society of Comparative Religions, a forty-minute essay on Bantu Theology.

At the wish of that Society I loaned the manuscript to them, for their use in the Parliament of Religions at the Chicago Exposition; but I carried the original draft of the essay with me on my return to Africa in August, 1893, where I was located at Libreville, Gabun, the Mission’s oldest and most civilized station. There I found special advantage for my investigations. Though those educated Mpongwes could tell me little that was new as to purely unadulterated native thought, they, better than an ignorant tribe, could and did give me valuable intelligent replies to my inquiries as to the logical connection between native belief and act, and the essential meaning of things which I had seen and heard elsewhere. My ignorant friends at other places had given me a mass of isolated statements. My Mpongwe friends had studied a little grammar, and were somewhat trained to analyze. They helped me in the collocation of the statements and in the deduction of the philosophy behind them. It was there that I began to put my conclusions in writing.

In 1895 Miss Mary H. Kingsley journeyed in West Africa, sent on a special mission to investigate the subject of freshwater fishes. She also gratified her own personal interest in native African religious beliefs by close inquiries all along the coast.

During her stay at Libreville in the Kongo-Français, May-September, 1895, my interest, common with hers, in the study of native African thought led me into frequent and intimate conversations with her on that subject. She eagerly accepted what information, from my longer residence in Africa, I was able to impart. I loaned her the essay, with permission to make any use of it she desired in her proposed book, “Travels in West Africa.” When that graphic story of her African wanderings appeared in 1897, she made courteous acknowledgment of the use she had made of it in her chapters on Fetich.

On page 395 of her “Travels in West Africa,” referring to my missionary works, and to some contributions I had made to science, she wrote: “Still I deeply regret he has not done more for science and geography.... I beg to state I am not grumbling at him ... but entirely from the justifiable irritation a student of fetich feels at knowing that there is but one copy of this collection of materials, and that this copy is in the form of a human being, and will disappear with him before it is half learned by us, who cannot do the things he has done.”

This suggestion of Miss Kingsley’s gave me no new thought; it only sharpened a desire I had hopelessly cherished for some years. In my many missionary occupations—translation of the Scriptures, and other duties—I had never found the strength, when the special missionary daily work was done, to sit down and put into writing the mass of material I had collected as to the meaning and uses of fetiches. Nor did I think it right for me to take time that was paid for by the church in which to compile a book that would be my own personal pleasure and property.

Impressed with this idea, on my fourth furlough to America in 1899, I confided my wish to a few personal friends, telling them of my plan, not indeed ever to give up my life-work in and for Africa, but to resign from connection with the Board; and, returning to Africa under independent employ and freed from mission control, but still working under my Presbytery, have time to gratify my pen.

One of these friends was William Libbey, D. Sc., Professor of Physical Geography and Director of the E. M. Museum of Geology and Archæology in Princeton University. Without my knowledge he subsequently mentioned the subject to his university friend, Rev. A. Woodruff Halsey, D.D., one of the Secretaries of the Board of Foreign Missions. Dr. Halsey thought my wish could be gratified without my resigning from the Board’s service.

In November, 1899, the following action of the Board was forwarded to me: “November 20th, 1899. In view of the wide and varied information possessed by the Rev. Robert H. Nassau, D.D., of the West Africa Mission, regarding the customs and traditions of the tribes on the West Coast, and the importance of putting that knowledge into some permanent form, the Board requested Dr. Nassau to prepare a volume or volumes on the subject; and it directed the West Africa Mission to assign him, on his return from his furlough, to such forms of missionary work as will give him the necessary leisure and opportunity.”

On my return to Africa in 1900, I was located at Batanga, one hundred and seventy miles north of Gabun, and was assigned to the pastorate of the Batanga Church, the largest of the twelve churches of the Corisco Presbytery, with itineration to and charge of the sessions of the Kribi and Ubĕnji churches.