frequently counterfeited on the Continent, especially the Low Countries, and despite a ban in 1283, English coinage was secretly exported to the European continent. In August 1280, Edward forbade the usage of the old long cross coinage, which forced the populace to switch to the newly minted versions. Records indicate that the coinage overhaul successfully provided England with a stable currency. Edward's frequent military campaigns put a great financial strain on the nation. There were several ways through which the King could raise money for war, including customs duties, money borrowing and lay subsidies, which were taxes collected at a certain fraction of the moveable property of all laymen who held such assets. In 1275, Edward negotiated an agreement with the domestic merchant community that secured a permanent duty on wool, England's primary export. In 1303, a similar agreement was reached with foreign merchants, in return for certain rights and privileges. The revenues from the customs duty were handled by the Riccardi, a group of bankers from Lucca in Italy. This was in return for their service as money lenders to the crown, which helped finance the Welsh Wars. When the war with France broke out, the French king confiscated the Riccardi's assets, and the bank went bankrupt. After this, the Frescobaldi of Florence took over the role as money lenders to the English crown. Another source of crown income was represented by the English Jews. The Jews were the King's personal property, and he was free to tax them at will. By 1280, the Jews had been exploited to a level at which they were no longer of much financial use to the crown, but they could still be used in political bargaining. Their loan-with-interest businessa practice forbidden to Christianshad made many people indebted to them and caused general popular resentment. In 1275, Edward had issued the Statute of the Jewry, which outlawed loan with interest and encouraged the Jews to take up other professions; in 1279, in the context of a crack-down on coin-clippers, he arrested all the heads of Jewish households in England and had around 300 of them executed. In 1280, he ordered all Jews to attend special sermons, preached by Dominican friars, with the hope of persuading them to convert, but these exhortations were not followed. The final attack on the Jews in England came in the Edict of Expulsion in 1290, whereby Edward formally