The third of the great dynasties which had ruled over this limited China had, in 842 B.C., already been on the imperial throne for practically three hundred years, and, following the custom of its predecessors, it had parcelled out all the land under its sway to vassal princes who were, subject to the general imperial law and custom, or ritual, together with the homage and tribute duty prescribed thereunder, all practically absolute in their own domains. Roughly speaking, those smaller fiefs may be said to have corresponded in size with the walled-city and surrounding district of our own times, so well known under the name of _hien_. About a dozen of the larger fiefs had been originally granted to the blood relations of the dynastic founder in or after 1122 B.C.; but not exclusively so, for it seems to have been a point of honour, or of religious scruple, not to "cut off the sacrifices" from ruined or disgraced reigning families, unless the attendant circumstances were very gross; and so it came to pass that successive dynasties would strain a point in order to keep up the spiritual memory of decayed or rival houses. Thus, at the time of which we speak (842 B.C.), about ten of the dozen or so of larger vassal princes were either of the same clan as the Emperor himself, or were descended from remoter branches of that clan before it secured the imperial throne; or, again, were descended from ministers and statesmen who had assisted the founder to obtain empire; whilst the two or three remaining great vassals were lineal representatives of previous dynasties, or of their great ministers, keeping up the honour and the sacrifices of bygone historical personages. As for the minor fiefs, numbering somewhere between a thousand and fifteen hundred, these play no part in political history, except as this or that one of them may have been thrust prominently forward for a moment as a pawn in the game of ambition played by the greater vassals. Nominally the Emperor was direct suzerain lord of all vassals, great or small; but in practice the greater vassal princes seem to have been what in the Norman feudal system were called "mesne lords"; that is, each one was surrounded by his own group of minor ruling lords, who, in turn, naturally clung for protection to that powerful magnate who was most immediately accessible in case of need; thus vassal rulers might be indefinitely multiplied, and there is some vagueness as to their numbers.