• Name: Petty, John Henry (marquess of Lansdowne)
• Gender: Male
• Death Date: 14  November  1809
• Occupation: politician

Lansdowne held the title of Marquess of Lansdowne for only four years. He succeeded his father the first Marquess of Lansdowne in 1805 and was in turn succeeded by his half-brother, Henry Petty Fitzmaurice. The DNB states that he led an eccentric life and suffered from ill-health.

His dates of birth and death can be deduced from funeral notices and obituaries in The Times, 24 November 1809, the Morning Chronicle, 19 November 1809, and Aberdeen Journal, 22 November 1809.

Godwin records his death.

• The Times
• Morning Chronicle
• Aberdeen Journal
• DNB

This table lists the people this person is most frequently noted with in the diary.