Nongqawuse was the Xhosa prophetess whose prophecies led to a millennialist movement that culminated in the Xhosa cattle-killing crisis of 1856–1857. In April or May 1856, the teenaged Nongqawuse and her friend Nombanda went to fetch water from a pool near the mouth of the Gxarha River. When she returned, Nongqawuse told her uncle and guardian Mhlakaza, a Xhosa spiritualist, that she had met the spirits of three of her ancestors. Wikipedia
The definitive Wikipedia entry for Nongqawuse. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Nongqawuse