GR Elton saw the duty of historians as empirically gathering evidence and objectively analysing what the evidence has to say.
Exactly so, Scary. As any fule kno, their source material is inevitably tainted with the baggage and mores of the past and it’s their job to sort the wheat from the chaff.
Samuel Pepys’ Diary is riven with evidence of corruption, fraud, nepotism, gross misconduct, incompetence and negligence at every level of the Navy, Parliament, the monarchy, and society in general. His morals were reprehensible and it would be easy these days to write him off on those grounds alone (as well as the basis of a few soundbites taken out of context) but we would also lose a valuable eye witness account of life during the Restoration and particularly during the Great Fire.
I remain puzzled, though, as to why he thought burying a wheel of Parmesan might be a good idea, even if he thought it might protect it from the Great Fire. Still, good to know that even in 1666, Britain was still able to import fine Italian foods despite the best efforts of the marauding Dutch fleets and in the absence of any trade agreement. 
Even the Walloons manage (just) to acknowledge that Wellington won Waterloo!
In the same way as the Australians acknowledge the result of the 2003 Rugby World Cup. Through gritted teeth, as I recall. England’s (and Jonny Wilkinson’s) victory got scant mention in a tiny paragraph buried on the back page of the Sydney Morning Herald. If Australia had won, it would have splashed all over the front page in the biggest font available and we would never have heard the last of it.
Morning, Greenish. I suspect the Islanders have waited a long long time for this moment. The fishing agreement with the French fell outside EU reach but expired naturally with Brexit. Never cross an Islander. They have long memories. 