All this, however, was exceedingly detrimental to the reputation of Mafuta, the chief witch-doctor of the community, who found his power and influence rapidly waning, and he soon discovered means to make me understand that I must cease to trespass upon what he deemed his own exclusive sphere of operations, on pain of making him my mortal enemy. This of course was bad, for I was in no position to make any man my enemy, much less an individual of such power and influence as Mafuta; nevertheless I continued to prescribe for all who came to me, trusting that if ever it should come to a struggle between Mafuta and myself, the gratitude of my patients would suffice to turn the scale in my favour.