London: Frank Cass, 1968.
Hardcover. Fine in a Very Good dust jacket. Reprint of the 1875 edition. An as-new copy in a clean, price-clipped dust jacket, lightly sunned at the spine and top edge, and with a few tiny tears. Slavery Series No. 3. "Aimed at whipping up a state of public opinion which would force the British government into concrete diplomatic action to end Mohammodean and Portuguese slaving in East Africa."