- The Development of Africa
- The Gymnasium And Its Fittings: Being An Illustrated Description Of Gymnastic Apparatus, Covered And Open Air Gymnasia
- The Birthplaces of the People and the Laws of Migration
- A Life's Work: A Catalogue Of Maps, Books, And Papers Drawn, Comp., Of Written, 1853-1908...
- 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