The Spanish government proved quite incapable of grappling with these wrongs and difficulties. There were, however, numerous attempts to legislate in the direction of reform. Measures forbidding the introduction of silk proceeding from abroad received the royal signature in 1500, 1514, 1525, 1532, and 1552. A petition to the same effect, framed by the procurators of the Cortes, was presented to the king in 1618, urging that no skein or twisted silk proceeding from the Portuguese Indies, China, or Persia should be imported into Spain in view of the damage thus inflicted on the silk-producing regions of Granada, Murcia, and Valencia. At the same time the petitioners suggested that if it should be found impracticable to suppress such importation altogether, the foreign silk should be required to be in the form of stuffs already woven. Matters grew steadily worse all through the reign of Philip the Fourth. The principal cause of this additional decline lay in the constant depreciation of the national currency, which kept at an intolerable pitch of dearness the price of home-grown silk, and enabled foreign traders to undersell the Spaniard. This will be better understood if we consider that the composition of the copper and silver coinage was often tampered with by Crown and Parliament in such a way as to allow the foreigner to rid the country of nearly all her gold and silver, leaving in exchange only the baser metal. At intervals of a few years, proclamations were issued altering the values of the coinage in the most capricious and disastrous terms, and Ulloa mentions as still in circulation in the eighteenth century, _ochavos_ of Philip the Third which bore inscribed the value of twelve _maravedis_ in Roman numerals, and also (owing to the restamping of the coins by order of the Crown), the second and successive value of eight _maravedis_, marked in ordinary numerals. In fact, so grave were these abuses, that the arbitrary value imposed upon the coins in question grew to be six times that of the actual value of the metal.