David Livingstone, Charles Livingstone (1865). “Narrative of an Expedition to the Zambesi and Its Tributaries: And of the Discovery of the Lakes Shirwa and Nyassa. 1858-1864”, p.152
"Hoyt's New Cyclopedia Of Practical Quotations" by Jehiel Keeler Hoyt, letter describing the death of Bishop Mackenzie in Africa (March 1862), (pp. 388-390), 1922.
David Livingstone, Horace Waller (2011). “The Last Journals of David Livingstone in Central Africa, from 1865 to His Death: Continued by a Narrative of His Last Moments and Sufferings, Obtained from His Faithful Servants, Chuma and Susi”, p.289, Cambridge University Press
David Livingstone (2002). “The Life and African Explorations of Dr. David Livingstone: Comprising All His Extensive Travels and Discoveries : as Detailed in His Diary, Reports, and Letters, Including His Famous Last Journals : with Maps and Numerous Illustrations”, p.516, Rowman & Littlefield