He was playing a game of chess with the jailer, when the Emperor's, or, rather, Chong Mong-ju's, messenger arrived with the poison-cup.

"Wait a moment," said Yunsan.
"You should be better-mannered than to disturb a man in the midst of a game of chess.

I shall drink directly the game is over." And while the messenger waited Yunsan finished the game, winning it, then drained the cup.
It takes an Asiatic to temper his spleen to steady, persistent, life-long revenge.

This Chong Mong-ju did with the Lady Om and me.

He did not destroy us.