Yong-le: Year 6, Month 8, Day 17
6 Sep 1408
The eunuch Zhang Yuan was sent with Imperial orders with which to go and instruct Zhao Lu-qun Ying-duo-li-di-la, the king of the country of Siam, to confer on the king brocaded fine silks and silk gauzes and to escort the Siamese person Bei-hei back to his country. Formerly, Bei-hei and others had followed his country's envoy who was coming to offer tribute, but while at sea they had met great winds and were blown to Yi-an Prefecture in Annam. Here they were captured and detained by the Li bandits. When the troops of the Qian-guo Duke Mu Sheng reached Yi-an, they found Bei-hei. They also sought the country's envoy, but it was discovered that he had been killed by the Li bandits. At this time, Bei-hei, who had been forwarded by Sheng to the capital, was provided with clothing and assistance, and was sent back to Siam with Yuan. The king of the country of Siam was also ordered to extend great sympathy to the family of their country's envoy, who had been killed by the Li bandits.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 11, page 1103/04