King decided that Britain's military expenditure should not exceed its prewar levels, but they thought a large presence was necessary in America to deal with the French and Spanish threat. They therefore charged the colonists for the increased military levels, thus catalysing the resistance to taxes which led to the American Revolution. Bute also introduced a cider tax of four shillings per hogshead in 1763 to help finance the Seven Years' War. The journalist John Wilkes published a newspaper, The North Briton, in which both Bute and the Dowager Princess of Wales were savagely satirised. Bute resigned as prime minister shortly afterwards, although he remained in the House of Lords as a Scottish representative peer until 1780. He remained friendly with the Dowager Princess of Wales, but her attempts to reconcile him with George III proved futile. Post-premiership For the remainder of his life, Bute remained at his estate in Hampshire, where he built himself a mansion called High Cliff near Christchurch. From there he continued his pursuit of botany and became a major literary and artistic patron. Among his beneficiaries were Samuel Johnson, Tobias Smollett, Robert Adam, William Robertson and John Hill. He also gave considerably to the Scottish universities. He financed Alberto Fortis's travels into Dalmatia. His botanical work culminated in the publication of Botanical Tables Containing the Families of British Plants in 1785. Even after his retirement, Bute was accused by many Americans in the years leading up to the American Revolutionary War as having an undue corrupting influence over the British government. He died at his home in South Audley Street, Grosvenor Square, Westminster, from complications of a fall suffered while staying at Highcliffe, and was buried at Rothesay on the Isle of Bute. Legacy The flowering plant genera Butea, Stewartia and Stuartia are named after him. In 1761, Bute was appointed Ranger of Richmond Park by King George III, a post he held until his death; Bute Avenue in Petersham near the park is named after him. According to historian John Naish, the 18th-century expression "Jack Boot" meaning a stupid person originated as disparagement of Stuart's performance as prime minister. Luton Hoo Bute purchased Luton Hoo, or Luton Park, from Francis Herne MP in 1763 for the sum of £94,700. Recognising that the existing buildings were unsuitable, Bute commissioned the neoclassical architect Robert Adam to oversee the redesign of the estate house. Initial designs were