Morley took his seat in the House of Lords on his 21st birthday in 1793. He was an active member of the House of Lords, initially supporting government policies until the death of William Pitt the Younger in 1806.
After Pitt's death he supported George Canning, with whom he corresponded on political matters for many years.
In 1815 he was created Viscount Boringdon, of North Molton in the County of Devon, and Earl of Morley, in the County of Devon.
After Canning's death in 1827 he began to support the Whigs, and voted for the Great Reform Act of 1832.
Apart from his involvement in national politics, Morley was also a great benefactor to public works in his home county of Devon and was a Fellow of the Royal Society.[5] He made only minor additions to the family seat at Saltram, including the porch and enlargement of the library, 1818–20.[6]
Secondly in 1809 he married Frances Talbot (1782–1857), only daughter of Thomas Talbot of Gonville and Wymondham, by whom he had one son and one daughter:[8]
^Pevsner, Nikolaus & Cherry, Bridget, The Buildings of England: Devon, London, 2004, p.711
^Vivian, Lt.Col. J.L., (Ed.) The Visitations of the County of Devon: Comprising the Heralds' Visitations of 1531, 1564 & 1620, Exeter, 1895, p.588, pedigree of Parker