The paintings in the Pantassa at Mistra formed the last important monument of the medieval free Greek world

There is a great charm about it all; but it is the art of a civilization that has outlived its political basis, and art of wistful nostalgia for which there was not future. The paintings in the Pantassa at Mistra formed the last important monument of the medieval free Greek world. 

 S. Runciman, Lost capital of Byzantium (1980), 95-6 

The epithet fits Andronicus II better than Andronicus III, who was not very pious

All we know of him [Andrew, governor of the Peloponnese] is that he was appointed by 'the pious Emperor Andronicus' - the epithet fits Andronicus II better than Andronicus III, who was not very pious, but it was often given formally to emperors, regardless of their characters - and that he was the father of a saint, Leontius of Achaea, who was noted for his good works later in the century.

S. Runciman, Lost capital of Byzantium (1980), 48

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

I fear I should never be a success at Oxford ... I should never talk or drink enough

'I fear I should never be a success at Oxford ... I should never talk or drink enough.' However, by the post-war period, Cambridge was beginning to develop a reputation - unfortunate in Steven's view - for narrower professionalism. Trevor-Roper diagnosed the same disease at Oxford, and was determined to lead the alliance that would purge it.

M. Dinshaw, Outlandish knight: the Byzantine life of Steven Runciman (2016), 365

The firmly Liberal Runcimans had entrusted the education of their children to one of the last seventeenth century Tories in Britain

Torby's [Runciman's governess] interests were academic though not dry, her instincts artistic but not fanciful. She treated her adopted Episcopalian religion in a spirit of hereditary romance; her politics, accordingly, were entirely traditional. The firmly Liberal Runcimans had entrusted the education of their children to one of the last seventeenth century Tories in Britain.

M. Dinshaw, Outlandish knight: the Byzantine life of Steven Runciman (2016), 4-5

But my dear, nothing beats Vatican gossip

... Steven Runciman, whom Paddy had met in Sofia in 1934 and who was now the British Council's Representative. Tall , fastidious and a brilliant linguist, Runciman was then working on the History of the Crusades that made his name; but his chief recreation was collecting scandals and stories. 'Royal gossip is very good,' he once said, 'and political gossip is even better; but my dear, nothing beats Vatican gossip.'

A. Cooper, Patrick Leigh Fermor: an adventure (2013), 206