- A Grammar of the Yoruba Language
- A Grammar of the Yoruba Language
- Vocabulary of the Yoruba Language, to Which Are Prefixed the Grammatical Elements of the Language
- A Vocabulary of the Yoruba Language: Together with Introductory Remarks by the Rev. O. E. Vidal
- Journals of the Rev. James Frederick Schön and Mr. Samuel Crowther: Who, with the Sanction of Her Majesty's Government, Accompanied the Expedition Up the Niger, in 1841, in Behalf of the Church Missio