Southworth, A. S. (1875). Four thousand miles of African travel: A personal record of a journey up the Nile and through the Soudan to the confines of Central Africa, embracing a discussion on the sources of the Nile, and an examination of the slave trade. Baker, Pratt & Co. ; Sampson, Low & Co..

Southworth, Alvan S. Four Thousand Miles of African Travel: A Personal Record of a Journey Up the Nile and Through the Soudan to the Confines of Central Africa, Embracing a Discussion on the Sources of the Nile, and an Examination of the Slave Trade. New York : London: Baker, Pratt & Co. ; Sampson, Low & Co., 1875.

Southworth, Alvan S. Four Thousand Miles of African Travel: A Personal Record of a Journey Up the Nile and Through the Soudan to the Confines of Central Africa, Embracing a Discussion on the Sources of the Nile, and an Examination of the Slave Trade. Baker, Pratt & Co. ; Sampson, Low & Co., 1875.