While focussing on the metre-gauge lines that served Kampala and Uganda from the East African coast at Mombasa and in particular, doing research on the route of the line out of Mombasa, I came across photographs and old postcards that showed traces of a tramway or trolleyway in the streets of Mombasa in the late nineteenth century. It needed more research and the linked article is the result:
https://rogerfarnworth.wordpress.com/2018/05/21/mombasa-kenya-a-very-early-tramway
