G.S. Mackenzie to Secretary, IBEA Co. Encloses & comments on Capt. Pullen's survey of rivers Ozi & Tana. Suggests director shows Secretary of State for Foreign Affairs relevant papers & to take steps to enforce IBEA Co.'s rights. Enclosure- Pullen's report to Consul-general. Details of Witu territory. Swaheli ruling tribe - headed by Sultan Achmed. Fields worked by slaves. Gallas & escaped Zanzibar slaves also work there. Many craftsmen. Climate & vegetables described. Rubber important industry. Raids by Gallas & Somalis frequent.