I have old photos which were kept in a now-very-dilapidated box which must have held chocolates in the 1920s.
I wish the laughing emoji were still with us.
Seriously, no doubt loads of documents were thrown away, but ones about land would be important. My county archive allows people to look at things. All counties have their archives, I guess. Earlier this year I looked at a document from 1321, about a land lease I think. Vellum, apparently, so I didn't have to wear gloves. MM could have had history lessons on Tuesday afternoons.
I believe she and Harry went to see 'Hamilton'. Did they ever go to a play or a concert or a film?