Livingstone, W. P. The White Queen of Okoyong, Mary Slessor title page (Mary Slessor; White Queen of Okoyong)
Wikipedia WWW site, viewed 25 October, 2013 (Mary Mitchell Slessor; born 2 December, 1848, Aberdeen, Scotland; died 13 January, 1915, Use Ikot Oku, Nigeria; Scottish missionary with the Foreign Mission Board of the United Presbyterian Church; spread Christianity and promoted women's rights in the Calabar region of modern day Nigeria; acquired the nickname White Queen of Okoyong) http://en.wikipedia.org/wiki/Mary_Slessor