The Zanzibar police had caught a slave trader in the act of exporting slaves from Pemba and he had been arrested .
Raikes was acting prime minister of Zanzibar by 1898 when he was involved in a diplomatic incident with France .
The Zanzibar police had caught a slave trader in the act of exporting slaves from Pemba and Raikes had been arrested .
Raikes was acting prime minister of Zanzibar by 1898 when he was involved in a diplomatic incident with France .