Henry Petty-Fitzmaurice, 3rd Marquess of Lansdowne

Politician and statesman.

National Gallery Trustee (1834–1863).

No known connections with slavery.

History of Parliament states that "William Wilberforce was prepared to let him sponsor the abolition of the slave trade, because he ‘stands well with the House’". (R.G. Thorne, ‘PETTY, Lord Henry (1780-1863)’, in History of Parliament Trust (ed.), The History of Parliament: British Political, Social & Local History [online], London, 1964 -, 1790-1820 <https://www.historyofparliamentonline.org/volume/1790-1820/member/petty-henry-1780-1863> accessed 5 August 2021.)

ODNB observes that championing the end of slavery was a cause dear to him.

R. G. Thorne, 'PETTY, Lord Henry (1780-1863)', in History of Parliament Trust (ed.), The History of Parliament: British Political, Social & Local History, London 1964-, 1790-1820, https://www.historyofparliamentonline.org/volume/1790-1820/member/petty-henry-1780-1863
Checked and found — Item on publisher's website

J. Turner et al. (eds), Grove Art Online, Oxford 1998-, https://www.oxfordartonline.com/groveart/
Checked and not found — Item on publisher's website

UCL Department of History (ed.), Legacies of British Slave-ownership, London 2020, https://www.ucl.ac.uk/lbs/
Checked and not found — Item on publisher's website

C. J. Wright, 'Fitzmaurice, Henry Petty-, third marquess of Lansdowne', in C. Matthew et al. (eds), Oxford Dictionary of National Biography, Oxford 1992-, https://doi.org/10.1093/ref:odnb/22071
Checked and found — Item on publisher's website