About Mary Slessor
Mary Mitchell Slessor was a Scottish Presbyterian missionary to Nigeria. Once in Nigeria, Slessor learned Efik, one of many local languages, then began teaching. Because of her understanding of the native language and her bold personality Slessor gained the trust and acceptance of the locals and was able to spread Christianity while promoting women's rights and protecting native children. She is most famous for her role in helping to stop the common practice of infanticide of twins in Okoyong, an area of Cross River State, Nigeria.
Biography source:
Wikipedia