The domestic serenity of the realm was, however, greatly disturbed at this moment by Dean Swift, who seized on the occasion to avenge himself on the Whig Ministry for the defeat and punishment of his party, and especially of his particular friends and patrons, Oxford and Bolingbroke. There had long been a great deficiency of copper coin in Ireland. The Government undertook to remove this pressing want of so useful a medium, and they set about it in an honest and honourable manner as regarded the quality of the coin. Tenders were issued, and various offers received for the coining of farthings and halfpence to the value of a hundred and eight thousand pounds. The proposal of Mr. William Wood, an iron and copper founder, of Wolverhampton, was accepted; but the quality of the coin, both as to weight and fineness, was determined by the advice of Sir Isaac Newton, then Master of the Mint, and Wood was bound under heavy penalties to furnish it according to this stipulation. Every care was used by the Ministers and the Solicitor- and Attorney-General to insure the supply of a much better copper coinage than Ireland had ever possessed before. There were some circumstances, however, which came out that created considerable suspicion and displeasure in Ireland. Wood had given a bribe to the king's mistress, the Duchess of Kendal, to procure him the contract, and the Government had ordered the coinage without paying the Irish Privy Council and Lord-Lieutenant the compliment of consulting them on this occasion. Swift saw these errors, and seized on them for his own purposes. He did not stop to inquire whether, after all, the proposed coinage would not, in any circumstances, be much better than the present distressing scarcity of copper money, and whether the farthings and halfpence might not turn out as good, though they were contracted for. It was enough for him that there was a cause of discontent which he could fan into a flame against the British Government. He threw all his spiteful soul into it, and his "Drapier's Letters" inflamed the public mind to such a degree that Walpole was compelled to cancel the patent.