Philip Wyatt in 1841 and cost £130,000 (equivalent to £10,772,000 in 2016) to build and furnish. Unfortunately, just as the mansion was being completed, a fire broke out and gutted the house; it was later restored and remodelled by Ignatius Bonomi. The family also used their newfound wealth to redecorate their country seat in Ireland, Mount Stewart, and bought Holdernesse House on London's Park Lane, which they renamed Londonderry House. Declines Orange invitation In 1836 the Orange Order was accused of plotting to place Ernest Augustus, Duke of Cumberland and Imperial Grand Master of the Orange Order, on the throne in place of Victoria when his brother King William IV died. Once the plot was revealed, the House of Commons called upon the King to disband the Order. Under pressure from Joseph Hume, William Molesworth and Lord John Russell, the King indicated measures would have to be taken and the Duke of Cumberland was forced to dissolve the Orange lodges. Hume laid evidence before the House of Commons that the plotters had approached Londonderry. In July 1832, the Marquess had received a letter from Lieutenant-Colonel W. B. Fairman, the Deputy Grand Secretary of the Orange Institution of Great Britain, advising him that following "a death of importance" (the passing of the King) the Orangemen would abandon their policy of "non-resistance" to the present "Popish Cabinet, and democratical Ministry" (the parliamentary reform ministry of Earl Grey) and that "it might be political" for the Marquess to join them. Noting that there were already Orange lodges in Newcastle, South Shields, and Darlington, Fairman also suggested to Londonderry that to assume the role in Durham of County Grand Master might be advantageous to him "in a personal sense": his "pitmen" (the miners employed in his collieries) might be induced to organise lodges among themselves which would "prove a partial check against their entering into cabals [i.e. trade unions] hereafter". While he conceded that he wished the government should do more to check "the baneful influence of the Liberal and Radical associations", including trade unions, Londonderry went to some length in the House of Lords to deny any possible connection between himself and "the alleged project for altering the succession to the throne". To Fairman he had replied: "the present state of liberal Whig feeling in this very Whig county, and the very refractory and insubordinate state of the pitmen, entirely preclude the possibility