relation to the Portuguese colonial presence in Africa. In "Memorandum ácerca das expedições realizadas na Zambesia septentrional", Carl Wiese recounts his experiences organizing expeditions with indigenous elephant hunters to acquire ivory, as well as his negotiations and political maneuvering with local chiefs like Mpesene and Muassa to establish Portuguese influence in the region. The narrative highlights various challenges faced during the expeditions, including conflicts, resource scarcity, and competition from other colonial powers, particularly the British. Notably, Wiese describes his successful establishment of treaties that recognized Portuguese sovereignty over vast territories, the construction of settlements, and the cultivation of good relationships with local populations, all while emphasizing the significance of these efforts for the future of Portuguese colonial interests in Southern Africa. (This is an automatically generated summary.)