THE SLAVE TRADE 
1 57 
slave trade to a close and largely diminished the source of profit in the 
South-East African slave trade; for American ships came no longer to the 
Mozambique coast to take away cargoes of slaves and to evade the British 
cruisers. Then the Portuguese awoke to a sense of duty and a series of edicts 
made slavery very difficult and the slave trade practically impossible in all the 
settled portions of Portuguese East Africa. But the Eastern market always 
ARAB ANI) SWAHILI SLAVE-TRADERS, CAPTURED BY THE B.C.A. FORCES 
remained open and the Arabs carried their slaving enterprise farther and 
farther into the heart of British Central Africa. They had enlisted on their 
side powerful tribes like the Wa-yao, the Wa-nyamwezi, the Awemba, and the 
Angoni Zulus. Dr. Livingstone, however, appeared on the scene and his appeals 
to the British public gradually drew our attention to the slave trade in Eastern 
Central Africa until, as the direct result of Livingstone’s work, slavery and the 
slave trade are now at an end within the British Central Africa Protectorate, 
and are fast disappearing in the regions beyond under the South Africa 
