Song Si-yeol
Leader of the Westerners (later the Noron), adviser to Hyojong’s northern campaign plan and chief voice in the mourning-rite disputes; forced to take poison in 1689
A disciple of Kim Jang-saeng, heir to Yi I's school. He won Hyojong's trust and planned the northern expedition with him. In the mourning rite disputes he led the Westerner position, insisting that the royal house follow the same rites as scholar-officials. When the Westerners split, he became leader of the Noron (Old Doctrine). Opposing the naming of Consort Jang's son as heir in 1689, he was exiled to Jeju in the Gisa hwanguk and was made to drink poison at Jeongeup on the way back to the capital.

