sentences:  The Bisa had a reputation as great cloth traders throughout the region.In a curious note, the Goese-born Portuguese trader Manuel Caetano Pereira, who traveled to the Bisa homelands in 1796 was surprised to be shown a second, separate river referred to as the "Zambezi".This "other Zambezi" that puzzled Pereira is most likely what modern sources spell the Chambeshi River in northern Zambia.