Black Treasure The Youth of Africa in a Changing World By Mathews, Basil Books / Hardcover History: World › Africa Publisher: Friendship Press, January 1928 Price $10.66 Free Shipping Send to a friend Used - Acceptable Acceptable condition. Former Library book. Owner's name on front free endpage. Front hinge cracked. (Africa, missions, economic conditions) $10.66 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.