On no account would he be a party to the crowning of an upstart usurper of the legitimist Bourbon throne

But would every cardinal have shown the same courage as he when summoned as Dean of the Sacred College by the dreaded Napoleon in 1804 to accompany Pius VII to Paris for his coronation? The Cardinal King, as he then was, refused to go. It was a bold stance for an old man of eighty to take, and it brought about a physical collapse. But he would not budge. Not for nothing was he a believer in the divine right of kings. On no account would he be a party to the crowning of an upstart usurper of the legitimist Bourbon throne.

J. Lees-Milne, The last Stuarts (1983), 161

The Cardinal referred to George III as the Elector of Hanover.

Till his dying day, the Cardinal [Henry Benedict Stuart] referred, with a cold smile, to George III as the Elector of Hanover.

J. Lees-Milne, The last Stuarts (1983), 144

Had he boldly apostatized before he set out for Scotland he would probably have succeeded in this expedition

He [Charles Edward Stuart, the Young pretender] had never had strong religious convictions and only his father's undeviating faith and efforts to inculcate the necessity of his son's adherence to Catholicism prevented him from renouncing it before the Forty-Five. The irony of the story lies in the Prince's wavering. Had he boldly apostatized before he set out for Scotland he would probably have succeeded in this expedition and rallied that large body of secret Jacobite sympathizers who could not stomach the prospect of being ruled by another papist Stuart.

J. Lees-Milne, The last Stuarts (1983), 90

My dear, I hope you are a Jacobite

That pillar of Toryism Samuel Johnson, in a benign and paternal mood, apropos of nothing took his host's niece's hand and said to her, 'My dear, I hope you are a Jacobite.' The uncle with some warmth asked his guest what he meant by such a question. 'Why, sir,' said the doctor, 'I meant no offence to your niece; I meant her a great compliment. A Jacobite, sir, believes in the divine right of kings. He that believes in the divine right of kings believes in a divinity. A Jacobite believes in the divine right of bishops. He that believes in the divine right of bishops believes in the divine authority of the Christian religion.

J. Lees-Milne, The last Stuarts (1983), 3

But Debo christened him after her favourite jockey. She's never heard of the Duke of Wellington.

James Lees-Milne recorded in his diary that the Duke of Wellington was furious when he heard that Debo had called his son 'Morny', which happened to be a diminutive of the Wellesley title Lord Mornington. 'How would you like it,' he complained to the Duke of Devonshire at a party, 'if I christened my grandson Harty of Burlington?' Nancy broke in, 'But Debo christened him after her favourite jockey. She's never heard of the Duke of Wellington.'

M.S. Lovell, The Mitford girls (2001), 385, note 1 (p.564) 

Citing J.Less-Milne, Prophesying peace (1999), 345 

Hunting can't be justified ... yet they are all good things

in July 1997 he [Runciman] fell into conversation with James Lees-Milne on the subject of the recently elected New Labour administration: 'We  agreed that  hunting can't be justified, any more than hereditary peers, or for that matter religion - yet they are all good things.'

M. Dinshaw, Outlandish knight: the Byzantine life of Steven Runciman (2016), 416, footnote

His appointment of James Lees-Milne as his secretary in 1931 much to confirm

Peterson shared the assumption of most of the Foreign Service that Lord Lloyd was homosexual, an assumption that Lloyd's marriage to Blanche Lascalles in 1911 did little to shift and his appointment of James Lees-Milne as his secretary in 1931 much to confirm.

M. Dinshaw, Outlandish knight: the Byzantine life of Steven Runciman (2016), 247

Forced by a disobliging new world to shift on to the shoulders of an alien organization

[Lord Sackville] did not see himself in the role of a willing benefactor of the National Trust to be accorded grateful thanks on a public stage. He saw himself as the inheritor of a glorious palace the burden of which he had been forced by a disobliging new world to shift on to the shoulders of an alien organization while retaining, as far as it were possible, the status granted him by the old world.

J. Lees-Milne, People and Places: Country house donors and the national trust (1992), 181-2