Most Emperors and vassal princes are spoken of in history by their posthumous names, that is by the names voted to them after death, with the view of tersely expressing by that name the essential features (good or bad) of the deceased's personal character; just as we say in Europe, officially or unofficially, Louis le Bienaimé, Albert the Good, or Charles the Fat. The posthumous name of this Ts'in earl was "the Duke Muh" (no matter whether duke, marquess, earl, viscount, or baron when living, it was customary to say "duke" when the ruler was dead), and the posthumous name of the Emperor who died in 947 B.C. was "the King Muh"; for, as already stated, the Chou dynasty of Sons of Heaven were called "King," and not "Emperor" though their supreme position was as fully imperial as that of previous dynastic monarchs, and they were, in fact, "Emperors" as we now understand that word in Europe. At the same time that the Bamboo Annals were unearthed, there were also found copies of some of the old "classics" or "Scripture," and a hitherto unknown book called "the Story of the Son of Heaven Muh," all, of course, written in the same ancient script. This Son of Heaven (a term applied to all the Emperors of China, no matter whether they styled themselves Emperor, King, or August Emperor) was supposed to have travelled far west, and to have had interviews with a foreign prince, who, as his land too, was transcribed as _Siwangmu_. The subject will be touched upon more in detail in another chapter; but, for the present, it will be useful to say that, in the opinion of one very learned sinologist, all evidence points clearly to this expedition having been undertaken by Duke Muh of Ts'in, installed as he was in the old appanage of the emperors lost to the Tartars (as we have explained) in 771, and made over at the same time by the Emperor involved to the ancestors of Duke Muh. This view of the case is supported by the fact that in 664 B.C. Ts'in and Tsin, for some unknown reason, forced the Tartars of Kwa Chou to migrate into China, which migration was subsequently alluded to by a Tartar chief (when attending a Chinese durbar in 559 B.C.) as a well- known historical fact. It was undoubtedly the practice of semi- Chinese states, such as Ts'u, Wu, Yueh, and Shuh (the last is the modern Sz Ch'wan province, and its history was only discovered long after Confucius' time), to call themselves "Kings," "Emperors," and "Sons of Heaven," in their own country (just as the tributary King of Annam always did until the French assumed a protectorate over him; and just as the tributary Japanese did before they officially announced the fact to China in the seventh century A.D.); and there are many indications that Ts'in did, or at least might have done and would like to have done, the same thing. Hence, when the story of Muh was discovered, the literary manipulators--even if they did not really believe that it positively must refer to the Emperor Muh-might well have honestly