George and Emily Eden were a devoted sibling pair. Both unmarried, they were accepted as a mildly unconventional couple by friends in the dynastically conscious governing class. George (1784-1849) entered politics as a Whig to replace his elder brother, who had been groomed for success but drowned in the Thames off Westminster one January night in 1810. Four years later George inherited his father's peerage as 2nd Baron Auckland. In 1835 he was appointed...