of municipal proceedings at the time of the first purchase of charters. Certain it is that the communities in the 12th century became alive to the possibilities of their new position, that trade received a new impulse, and the vague constitutional powers of the borough court acquired a new need for definition. At first the selection of officers who were to treat with the exchequer and to keep the royal pleas was almost certainly restricted to a few rich persons who could find the necessary securities. Nominated probably in one of the smaller judicial assemblies, the choice was announced at the great Michaelmas assembly of the whole community, and it is not till the next century that we hear of any attempt of the vulgus to make a different selection from that of the magnates. The vulgus were able to take effective action by means of the several craft organisations, and first found the necessity to do so when taxation was heavy or when questions of trade legislation were mooted. Taxation leads to political reformation The taxation of the boroughs in the reign of Henry II was assessed by the king's justices, who fixed the sums due per capita; but if the borough made an offer of a gift, the assessment was made by the burgesses. In the first case the taxation fell on the magnates. In the levy per communam the assessment was made through the wardmoots (in London) and the burden fell on the poorer class. In Henry II's reign London was taxed by both methods, the barones majores by head, the barones minores through the wardmoot. The pressure of taxation led in the 13th century to a closer definition of the burghal constitutions; the Commons sought to get an audit of accounts, and (in London) not only to hear but to treat of municipal affairs. By the end of the century London had definitely established two councils, that of the mayor and aldermen, representing the old borough court, and a common council, representing the voice of the commonalty, as expressed through the city wards. The choice of councillors in the wards rested probably with the aldermen and the ward jury summoned by them to make the presentments. In some cases juries were summoned not to represent different areas but different classes; thus at Lincoln there were in 1272 juries of the rich, the middling and the poor,