The districts mentioned above received their supply of kurdi, as they were called, from the west coast; but the regions to the north of Unyamwezi, where they were in use under the name of simbi, were dependent on Muslim traders from Zanzibar.
Edellä mainitut alueet saivat kurdit, kuten niitä kutsuttiin, länsirannikolta; mutta alueet Unyamwezin pohjoispuolella, missä niitä käytettiin nimellä simbi, olivat riippuvaisia Zanzibarin muslimikauppiaista.