Thank you Jim, Nothing beats a good research subject like this one! there are some superb books and the web is full of little snippets and some big full productions such as the Wikipedia details well advanced in great detail with huge references to explore.. It is said that unless a student understands Ethiopia that essentially he will not understand anything about Africa and that is vital for the 19thC developments in Europe and leading up to WW1. the clues to British involvement in Sudan are on these pages … the war against the Mahdist and all ...are tied to this very essential reading.
please see
https://www.africaresource.com/rasta...-for-ethiopia/ and the accompanying artwork below showing the Russians who were at Adwa..