Journal of an expedition up the Niger and Tshadda rivers undertaken by Macgregor Laird in connection with the British Government in 1854 - Crowther, Samuel, (London, Church Missionary House, 1855)
https://www.biodiversitylibrary.org/bibliography/127549
Keywords: 1808-1861|Africa|Benue River|Benue River (Cameroon and Nigeria)|Description and travel|Indigenous peoples|Laird; MacGregor; |Niger River|Nigeria|Scientific Expeditions|Travel|