马欢
Ma Huan (1403 AD), the Chinese sailor part of the Imperial Chinese fleet under Cheng Ho (Zheng He) lauds the city as a great emporium of trade frequented by merchants from around the world. He makes note of the 20 or 30 mosques built to cater to the religious needs of the Muslims, the unique system of calculation by the merchants using their fingers and toes (followed to this day) and the matrilineal system of succession.