The Manchiu general sent back some of the runaway Coreans to their king, intimating that, though the Coreans were acting gratefully in assisting the Chinese, who had formerly helped the Coreans against the Japanese, yet it might hereafter be better to remain neutral. So far from taking any notice of this letter, the government at Seoul allowed the king’s subjects to cross the Yalu and assist the people of Liao Tung against the Manchius, who were making Hing-king their capital. At the same time the Chinese commander was permitted to enter Corea, and thence to make expeditions against the Manchius, by which they inflicted great damage upon the enemy. This continued until the winter of 1827, when the Manchius, having lost all patience with Corea, prepared to invade the peninsula. Compelling two refugees to act as their guides, they crossed the frozen Yalu in four divisions, in February, and at once attacked the Chinese army, which was defeated, and retreated into Liao Tung. They then began the march to Seoul. Ai-chiu was the first town taken, and then, after crossing the Ching-chong River, followed in succession the cities lining the high road to Ping-an. Thence, over the Tatong River, they pressed on to Seoul, the Coreans everywhere flying before them. Thousands of dwellings and magazines of provisions were given to the flames, and their trail was one of blood and ashes. Among the slain were two Hollanders, who were captives in the country. Heretofore a line of strong palisades had separated Corea from Manchuria, on the north, but large portions of it were destroyed at this time in the constant forays along the border. Those parts which stood yet intact were often seen by travellers along the Manchurian side as late as toward the end of the last century. Since then this wooden wall, a pigmy imitation of China’s colossal embargo in masonry, has gradually fallen into decay. The Manchius invested Seoul and began its siege in earnest. The queen and ladies of the court had already been sent to Kang-wa Island. The king, to avoid further shedding of blood, sent tribute offerings to the invaders, and concluded a treaty of peace by which Chō-sen again exchanged masters, the king not only acknowledging from the Manchiu sovereign the right of investiture, but also direct authority over his person, that is, the relation of master and subject. The Coreans now waited to see whether events were likely to modify their new relations, so reluctantly entered into, for the Chinese were far from beaten as yet. When free from the presence of the invading army the courage of the ministers rose, and by their advice the king, by gradual encroachments and neglect, annulled the treaty.