This was just 50 years before the arrival of the Spanish in the region. Consequently, Spanish chroniclers recorded accounts of Chimu culture from persons who had lived before the Inca conquest. Similarly, archaeological evidence suggest Chimor emerged from the remnants of Moche culture; early Chimu pottery had some resemblance to that of the Moche. Their ceramics are all-black, and their work in precious metals is very detailed and intricate. In the Late Chimu period, about 12,000 artisans lived and worked in Chan Chan alone. They engaged in fishing, agriculture, craft work, and trade. Artisans were forbidden to change their profession, and were grouped together in the citadel according to their area of specialization. Archeologists have noted a dramatic rise in the volume of Chimu craft production, which they attribute to artisans having been brought to Chan Chan from another area taken in conquest. As there is evidence of both metalwork (generally a male specialty) and weaving (a female art) in the same domestic dwelling, it is likely that both men and women were artisans. The men engaged in fishing, heavy agriculture (aided by irrigation and earthworks), and metallurgy. The women made ceramics and textiles (from spun and dyed cotton, llama, alpaca, and vicuña wool). People used reed fishing canoes, hunted, and traded using bronze coins.