- Vocabulary of the Galla Language
- Travels, Researches, and Missionary Labors During an Eighteen Years' Residence in Eastern Africa: Together With Journeys to Jagga, Usambara, Ukambani, ... a Coasting Voyage From Mombaz to Cape Delgado
- Journals of the Rev. Messrs. Isenberg and Krapf
- Outline Of The Elements Of The Kisuáheli Language: With Special Reference To The Kiníka Dialect...
- A Dictionary of the Suahili Language