It should be noticed that from the very first Korea was an independent kingdom. It was certainly so in the days of the Tan-gun and it remained so when Ki-ja came, for it is distinctly stated that though the Emperor Mu-wang made him King of Cho-sŭn he neither demanded nor received his allegience as vassal at that time. He even allowed Ki-ja to send envoys to worship at the tombs of the fallen dynasty. It is said that Ki-ja himself visited the site of the ancient Shang capital, but when he found it sown with barley he wept and composed an elegy on the occasion, after which he went and swore allegience to the new Emperor. The work entitled Cho-sŏ says that when Ki-ja saw the site of the former capital sown with barley he mounted a white cart drawn by a white horse and went to the new capital and swore allegience to the Emperor; and it adds that in this he showed his weakness for he had sworn never to do so. Ki-ja, we may believe, found Korea in a semi-barbarous condition. To this the reforms which he instituted give abundant evidence. He found at least a kingdom possessed of some degree of homogeneity, probably a uniform language and certainly ready communication between its parts. It is difficult to believe that the Tan-gun’s influence reached far beyond the Amnok River, wherever the nominal boundaries of his kingdom were. We are inclined to limit his actual power to the territory now included in the two provinces of P‘yŭng-an and Whang-hă. We must now inquire of what material was Ki-ja’s company of five thousand men made up. We are told that he brought from China the two great works called the _Si-jun_ and the _So-jun_, which by liberal interpretation mean the books on history and poetry. The books which bear these names were not written until centuries after Ki-ja’s time, but the Koreans mean by them the list of aphorisms or principles which later made up these books. It is probable, therefore, that this company included men who were able to teach and expound the principles thus introduced. Ki-ja also brought the sciences of manners (well named a science), music, medicine, sorcery and incantation. He brought also men capable of teaching one hundred of the useful trades, amongst which silk culture and weaving are the only two specifically named. When, therefore, we make allowance for a small military escort we find that five thousand men were few enough to undertake the carrying out of the greatest individual plan for colonization which history has ever seen brought to a successful issue.