338 The Period of Constitution Making they grew slowly through the adaptation of means to immediate ends, that there was a careful preservation of the valuable things of the past and a spirit of caution and compromise which allowed to each of several con- tending interests its due consideration, and that physical environment and many things which can be ascribed to nothing but pure chance played important parts. It has been shown that the great council was mainly feudal; but unlike the feudal courts of other lords it might at times contain menjwho chief, for the king was more than suzerain. This sum- moning of others was particularly marked in the reign of Henry II. , a king whose rule was so vigorous and all- embracing that he needed a variety of counsel. From the beginning, the wilj^of th^^n&jggas^an.,element in determining his court^s_ffl^^-up. The class of king's vasiiSFl^^ diverse within itself; while it contained all of the very great landholders, there were also within it many small holders. Probably from the time of the Conqueror, there was some recognised cleavage between those who held much land of the king and those who held little. In the reign of Henry L, the great ten- ants-in-chief, who led their own vassals to the feudal host, received a special form of^ummons^tp the host, and there was proBably"aTca5responding difference in the form of summons to court^service; at any rate there was such""' a*33^enS"lnTHenry II /s reign. Hence arose the distinctions between the ^^or^barons and the minor borons, of whom we begin to h.ear_in the twelfth century. I Attendance in the king's court was not regarded as a privilege, but as a burden in most instances. This was especially true of the minor barons who were less able to 1 Baron was not a title of dignity, but a term applying to all who held land of the king on the basis of military service. Only the major barons held baronies (a barony normally equalled 13^ knight's fees). On the original meaning of baron, see Maitland, C. H. E., p. 65. Finally the wo«t became solely applied to major barons; but vagueness in its use lasted long. "The bar ones of one clause of the great charter seem to be the bar ones major es of another.'* See also J. H. Round, "Barons" and "Knights" in the Great Charter in Magna Carta Commemoration Essays,