Yong-le: Year 19, Month 5, Day 3
2 Jun 1421
The envoy Wu-du-man and others who had been sent by Sai-fu-ding, the king of the country of Bengal, offered tribute of rhinoceros horn, ambergris and other products. Headwear and belts, suits of clothing as well as paper money and silks, as appropriate, were conferred upon them.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 14, page 2274