The son of the third duke of Portland; educated at Westminster School, he was a military officer and MP for Weobley (1816-24) and Queenborough (1824-26). He was a friend of Augusta Leigh.

REFERENCES TO Lord Frederick Cavendish- Bentinck:

Theresa Villiers to Lady Byron, [8 June 1816] in Astarte: a Fragment of Truth concerning George Gordon Byron, sixth Lord Byron (London: Christophers, 1921)

Lord Byron to Augusta Leigh, 17 September 1816 in Astarte: a Fragment of Truth concerning George Gordon Byron, sixth Lord Byron (London: Christophers, 1921)