298 The Period of Constitution Making Henry II. and John had many of the latter class in their official households. The truth seems to be that these earlier kings were strong enough to be served by whom they chose, while in the fourteenth century a more con- tinuous and effective baronial opposition was possible. Reform councils, devised of course by the barons, appear to have been artificial and were certainly ephemeral— great lords trying to enter and control a council which was normally and historically made up to a considerable extent of the king's choices from a different class. But whatever the truth on this point may be, continued friction between lords and king over the composition of the counselling group seems to have been an important cause of divergence between Parliament and Council, to have prevented the council core of the early Parliament from becoming a mere division or " house" of that body.1 From political motives the lords came to look on the Council as something different from themselves and, for certain purposes, something less than themselves. These descendants of the large and small sessions of the king's court were no longer the same; the difference became qualitative and not simply quantitative; the great coun- cil, the Parliament (with or without the representative knights and burgesses),2 the developing House of Lords was one thing, the Council not a wholly different thing, but becoming more so. In their judicial work, the use of the common law by the former and equity by the latter was both a result and a cause in this change.3 And it is also true that the judges of the central courts, who sat with both Lords and Council, merely advised the former, while, until late in the fourteenth century, they both advised and voted in the latter. The counsellor's oath was the subject of occasional modification and definition in the reigns of Edward I. and Edward II., but was always 1 This separation and general mistrust of the Council accounts in part for the decline in the amount and value of statutory legislation after Edward L, and for the rise of equity; for the Council was the natural place for the preparation and initiation of royal measures. See above, pp. 214, 215. See below, pp. 397-400. J See above, pp. 208, 209.