Arthur Penrhyn Stanley (1872). “The National Thanksgiving: Sermons Preached in Westminster Abbey: 1. Death and Life, December 10,1871; 2. The Trumpet of Patmos, December 17, 1871; 3. The Day of Thanksgiving, March 3, 1872”, p.15
David Livingstone (1857). “Missionary Travels and Researches in South Africa: Including a Sketch of Sixteen Years' Residence in the Interior of Africa”, p.244