This conspiracy was headed by the son of the executed Kim Il-gyŭng, by Mok Si-ryŭng the brother of Mok Ho-ryŭng and by the sons and other near relatives of the killed and banished leaders of the Soron party. A large force was collected in Kyŭng-sang Province and Yi In-jwa and Chöng Heui-ryang were put in command. The conspiracy honeycombed the whole country, for we are told that in P‘yŭng-an Province Yi Sa-sŭng took charge of an insurrectionary force, while at the capital Kim Chung-geui and Nam T‘ă-jung worked in its interests. It was agreed that on the twentieth of the third moon Seoul should be entered and that Prince Mil-wha be put on the throne. But there was a weak point in this as in all such ventures. One of the leaders in the south, An Pak, had a friend living at Yong-ju, in the direct line of the approach to Seoul and he warned him to move, as something was about to happen. The friend coaxed him into telling him the whole affair, and then brought the story straight to Seoul. This informer was Choé Kyo-sŭ. Immediately the king sent out a heavy guard to the river and also manned the wall of the capital. Troops were thrown into Yang-sŭng, Chin-wi, Su-wŭn, Yong-in, Chuk-san and Ch‘un-ch‘ŭn, and were told to seize anyone who made the least disturbance. The brother of An Pak being caught, he gave the details of the position of the rebel troops and other important particulars. The king appointed O Myŭng-hang of the Soron party as general-in-chief of an expedition against the seditious people of the south. He took with him 2,000 soldiers, but gathered more as he proceeded south. Strong bodies of troops were also sent north along the Peking road and to Puk-pawi outside the East Gate, to guard the approaches to the city. In the south loyal troops were in force at Mun-gyŭng Fortress near Cho-ryŭng Pass and the governor of Whang-hă Province also took soldiers and stationed himself at Whang-ju, near P’yŭng-yang. Others were stationed in the defiles of the mountains just beyond Song-do. It is quite evident from these extensive precautions that the plot was a wide-spread and dangerous one and that it had powerful leaders, not only in the country but at the capital itself.