Kim Bu-sik gathers the various garrisons and attacks Seogyeong; the walls fall, and Jo Gwang burns himself to death. (Goryeosa (History of Goryeo) 世家 卷16 仁宗 十四年)
1136: when Jo Gwang and others try to build a double wall inside the city against the government's earthen mound, Yun Eon-i and Ji Seok-sung ask to strike secretly and destroy it as the campaign is in its second year, but Kim Bu-sik refuses; through Yun Eon-i's insistence the army finally attacks in three divisions (Goryeosa Jeolyo (Essentials of Goryeo History) 권10 仁宗 十四年)