Fitzroy, who according to a contemporary could not ‘under any circumstances string six sentences together’, was a member of the wealthy Grafton dynasty, who held extensive estates in Norfolk and Northamptonshire.
In April 1863 Fitzroy offered in the family interest for Thetford to replace his eldest brother William, who had succeeded to the dukedom upon their father’s death.
Like his father, Fiztroy was a silent member in the Commons and he is not known to have sat on any select committees. An occasional attender, he gave steadfast support to Palmerston’s ministry on most major issues and voted for radical motions to abolish church rates, 29 Apr. 1863, and reform the borough franchise, 11 May 1864, 8 May 1865. He voted for the repeal of the malt tax, 7 Mar. 1865, a stance that was strongly supported by Norfolk’s brewers and barley growers.
Following the 1865 dissolution, Fitzroy decided to vacate his seat at Thetford in order to contest Northamptonshire South, home to his family’s Wakefield estates. Now less equivocal in his support for the Liberal party, he called for a ‘moderate’ extension of the franchise and the abolition of church rates.
Fitzroy offered again for Northamptonshire South at the 1868 election, where he had been in the field since June of that year, only to be defeated in third place by over 200 votes.
Fitzroy died at his residence at Balcombe, Sussex, in February 1919.
