Mary Slessor’s House in Calabar, Built in 1880.

Mary Mitchell Slessor (2 December 1848 – 13 January 1915) was a Scottish missionary to Nigeria. According to Wikipedia, the moment she entered Nigeria, Slessor learned Efik, one of the numerous 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 kîlling of twins in Okoyong, an area of Cross River State, Nigeria.