A close friend of the prince of Wales and heir to the earldom of Chesterfield, with its extensive estates in Derbyshire and Nottinghamshire, Stanhope could boast an impressive political pedigree. The first and second earls of Chesterfield had both been prominent, staunch royalists, while the fourth earl, Philip Dormer Stanhope, MP for St. Germans, 1715-22, and Lostwithiel, 1722-23, and a distinguished man of letters, had served briefly but very successfully as lord lieutenant of Ireland under Pelham.
Following a short career in the army, Stanhope acceded to a requisition from a ‘large number of electors’ and came forward for Derbyshire South at the 1857 general election. Unsurprisingly, he stressed his commitment to the agricultural cause, but his ambiguous position on the Maynooth grant and the vague nature of his address were mocked by his Liberal opponents, and he was easily defeated at the bottom of the poll.
In December 1860 Stanhope came in unopposed for the vacancy at Nottinghamshire South created by the succession of viscount Newark as the 3rd earl Manvers. His address declared that he was ‘strongly attached to Conservative principles’, but he was equivocal on the subject of parliamentary reform, arguing that the Commons and the country were apathetic towards it, whilst urging ‘moderate and well considered reforms as the progressive improvement of the people in wealth, intelligence, and education demands’. He was also noticeably ambiguous on foreign policy, praising the principle of non-intervention, but insisting that Britain should ‘keep up her forces’ and ‘be prepared for every emergency’.
A steady attender, there can be little doubt that Stanhope was loyal to the Conservative cause. He followed Disraeli into the division lobby on most major issues, and consistently opposed attempts to lower the county and borough franchises. However, it is difficult to detect any further parliamentary activity as he neither spoke in debate nor served on any select committees. He did, though, contribute to the 1861 royal commission on the fine arts. Alongside the prince of Wales and Lord Llanover, Stanhope was part of the three man committee appointed to determine the locations for statues of British sovereigns in the Palace of Westminster. The ambitious report recommended a series of 38 statues, beginning with Edward the Confessor and Harold, then from William the Conqueror downwards to Queen Victoria, with the majority of the statues to be placed in the Royal Gallery.
At the 1865 general election, when his seconder at the nomination rather unrealistically described him as ‘fearless’ and ‘out-spoken’, Stanhope attacked the Liberal government for failing to consider a reduction in the taxation of the agricultural interest, called for the abolition of the malt tax, and was re-elected unopposed.
In November 1871 Stanhope caught typhoid fever, along with the prince of Wales, while staying at Londesborough Lodge, near Scarborough.
