Prince Augustus Frederick, Duke of Sussex (27 January 1773 – 21 April 1843), was the sixth son and ninth child of King George III and his queen consort, Charlotte of Mecklenburg-Strelitz.

A Whig,[1] he was known for his liberal views, which included reform of Parliament, abolition of the slave trade, Catholic Emancipation, and the removal of existing civil restrictions on Jews and Dissenters.

In 1805, during the Napoleonic War, he served at home in Britain as Lieutenant-Colonel Commandant of the "Loyal North Britons" Volunteers regiment.

The King's minister of Hanover affairs Ernst zu Münster was sent to Italy to escort him back to London.

[5] The couple married again without revealing their full identities at St George's, Hanover Square, Westminster, on 5 December 1793.

[6] However, Prince Augustus Frederick continued to live with Lady Augusta until 1801, when he received a parliamentary grant of £12,000 and the couple separated, the Duke moving to Grosvenor Square.

[9] The King created him Duke of Sussex, Earl of Inverness, and Baron Arklow in the Peerage of the United Kingdom on 24 November 1801.

Sir William Dillon recorded in his diary they were both present with him at a party held by Emma Hamilton (Lord Nelson's mistress) where she rented tableware for the meal but neglected to rent a carving knife, creating great difficulty in serving the Christmas dinner to her guests.

George Oliver's Signs and Symbols Illustrated and Explained in a Course of Twelve Lectures on Freemasonry (1837) was dedicated to Prince Augustus Frederick, Duke of Sussex.

[16] In 1838, he introduced in a meeting scientist John Herschel, and the Duke gave a speech in which he spoke about the compatibility of science and religion: In making these remarks I am not presumptuous; but allow me to say, that attached as I am to science – attached as I am to religion, I am satisfied that the real philosopher is the most religious man; and it is in looking to the operations in nature that the finger of the Almighty leads us to the lesson.