The Main Portion of this book formed a chapter in my "Essays on Islam," published in 1901. I have made many additions to it and have added information more recent than any I then possessed. I have published it in this separate form, in order that attention may be more directly drawn to an important movement in Africa. Althrough increased interest is being taken in African Missions, I doubt whether there is yet any adequate conception of the seriousness of the position, or any true realization of the extreme urgency for immediate action. I trust this simple account of a little-known movement may be a means of developing still more interest in the affairs of all Societies engaged in mission work in Africa.
