The Emperor could thus neither leave nor enter his own particular territory, as all his vassals' territory is equally his. Hence his "mere motion" or pleasure makes an Empress, who needs no formal reception into his separate appanage by him. If the Emperor gives a daughter or a sister in marriage, he deputes a ruling prince of the Ki surname to "manage" the affair; hence to this day the only name for an imperial princess is "a publicly managed one." A feudal prince must go and welcome his wife, but the Emperor simply deputes one of his appanage dukes to do it for him. In the same way, these dukes are sent on mission to convey the Emperor's pleasure to vassals. Thus, in 651 B.C., a duke was sent by the Emperor to assist Ts'in and Ts'i in setting one of the four Tartar-begotten brethren on the Tsin throne (see Chapter X.). In 649 two dukes (one being the hereditary Duke of Shao, supposed to be descended from the same ancestor as the Earl reigning in the distant state of Yen) were sent to confer the formal patent and sceptre of investiture on Tsin. The rule was that imperial envoys passing through the vassal territory should be welcomed on the frontier, fed, and housed; but in 716 the fact that Wei attacked an imperial envoy on his way to Lu proves how low the imperial power had already sunk. The greater powers undoubtedly had, nearly all of them, clusters of vassals and clients, and it is presumed that the total of 1800, belonging, at least nominally, to the Emperor, covered all these indirect vassals. Possibly, before the dawn of truly historical times, they all went in person to the imperial court; but after the _débâcle_ of 771 B.C., the Emperor seems to have been left severely alone by all the vassals who dared do so. So early as 704 B.C. a reunion of princelets vassal to Ts'u is mentioned; and in the year 622 Ts'u annexed a region styled "the six states," admittedly descended from the most ancient ministerial stock, because they had presumed to ally themselves with the eastern barbarians; this was when Ts'u was working her way eastwards, down from the southernmost headwaters of the Hwai River, in the extreme south of Ho Nan. It was in 684 that Ts'u first began to annex the petty orthodox states in (modern) Hu Pêh province, and very soon nearly all those lying between the River Han and the River Yang- tsz were swallowed up by the semi-barbarian power. Ts'u's relation to China was very much like that of Macedon to Greece. Both of the latter were more or less equally descended from the ancient and somewhat nebulous Pelasgi; but Macedon, though imbued with a portion of Greek civilization, was more rude and warlike, with a strong barbarian strain in addition. Ts'u was never in any way "subject" to the Chou dynasty, except in so far as it may have suited her to be so for some interested purpose of her own. In the year 595 Ts'u even treated Sung and Cheng (two federal states of the highest possible orthodox imperial rank) as her own vassals,