38 The expedition commissioned Rev. James Schön, a German CMS pastor and linguist to recruit African language speakers in Sierra Leone and he found twelve including his assistant, Samuel Crowther. See J. Frederick Schön and Samuel Crowther, 1970 [1842], Journals of Rev. James Frederick Schön and Mr. Samuel Crowther who accompanied the Expedition up the Niger in 1841, London, Frank Cass, pp.iv-vi, 2-3 and William Allen and T. Thomson, 1841, A Narrative of the Expedition sent by Her Majesty's Government to the River Niger, in 1841 under the command of Captain H. D. Trotter, 2 vols., London, R. Bentley, vol. I, pp. 77-79. Crowther became the first African Bishop while the expedition chose King to head a proposed British colony in the Niger confluence. Before the mission, Crowther worked with Hannah Killam and Rev. Raban on their books on Yoruba language published in 1827 and 1830-32 respectively while working on a Yoruba dictionary and (with Thomas King) a translation of the Bible. See John Raban, 1830-1832, A Vocabulary of the Eyo, or Aku, a Dialect of West Africa, London, CMS; Crowther, 1843, Vocabulary of the Yoruba Language, London, Seeley, and Ajayi, 1960, "How Yorùbá was reduced to writing," $O D U$ vol. 8, pp. 49-58.  
would have required sending Osifekunde to Britain, which would have been totally new to him. If he found Paris tough, London would have been more difficult.