They had been captured during local wars and sold to Arab traders , taken to the coast , and then taken to Manuela in dhows .
According to Speke , the slaves he encountered were mostly from the Wahiyow tribe .
slaves had been captured during local wars and sold to Arab traders , taken to the coast , and then taken to Manuela in dhows .
According to Speke , the slaves he encountered were mostly from the Wahiyow tribe .