counterpart in France, the Estates-General, the English Parliament comprised the three great estates or orders—nobility, clergy, and commons—of which, aside from the peasantry, mediæval society in all western European countries was composed. In the working out of its internal structure, however, two chambers resulted, rather than, as in France, three. Originally the three estates sat separately. Their primary business was the voting of supplies and, the principle being that a tax ought to be conceded by those who would be called upon to pay it, the natural course was for the lords to grant their scutages and aids, the commoners their tenths and fifteenths, and the clergy their subsidies, apart. Indeed there is reason to believe that at times even the knights and the burgesses deliberated separately. Gradually, however, there appeared certain affiliations of interest which operated to modify the original practice. In the first place, the lesser clergy, inconvenienced by attendance and preferring to vote their contributions in the special ecclesiastical assemblages known as the convocations of Canterbury and York, contrived to throw off entirely their obligation of membership. The greater clergy and the greater barons, in the next place, developed sufficiently large interests in common to be amalgamated with ease in one body. Similarly, the lesser barons found their interests essentially identical with those of the country freeholders, represented by the knights of the shire, and with those of the burgesses. The upshot was a gradual alignment of the aggregate membership in two great groups, the one of which became historically the House of Lords, the other the House of Commons. At the beginning of the reign of Edward III. (1327-1377) the three estates still sat separately, but before the close of this period the bicameral arrangement seems definitely to have been established. There is no evidence that at any stage of their history the three groups ever sat as a single body. It need hardly be emphasized that the entire course of English history since the fourteenth century has been affected profoundly by the fact that the national assembly took the form of two houses rather than of one, as did the Scotch, of three as did the French, or of four as did the Swedish. But for the withdrawal of the lesser clergy, the number might very possibly have been three.