"27 June 1866 – To-day we came upon a man dead from starvation, as he was very thin. One of our men wandered and found many slaves with slave-sticks on, abandoned by their masters from want of food; they were too weak to be able to speak or say where they had come from; some were quite young."
January 1, 1970
https://en.wikiquote.org/wiki/History_of_slavery_in_the_Muslim_world