Conversation so far:
whats the historical background of the king?
Mongkut, King of Siam, was about 57 years old in 1861.
He had lived half his life as a Buddhist monk.
when did he become king?
When Nangklao died in 1850, Mongkut became king.
how did nangklao die?
CANNOTANSWER.

Question: what did the king do?
Self-contained rewrite: What did the king of Siam do?