John Hanning Speke,
The Discovery of the Source of the Nile
“ To this Dr K'yengo, who was now living with Rumanika as his head magician, added that, whilst he was living in Utambara, the Watuta invested his boma six months; and finally, when all their cows and stores were exhausted, they killed all the inhabitants but himself, and he only escaped by the power of the charms which he carried about him. These were so powerful, that although he lay on the ground, and the Watuta struck at him with their spears, not one could penetrate his body. ”
