I’ve written a blog post for the Society of Authors in Scotland about using archives in writing: you can find it at this link: https://societyofauthors.org/News/Blogs/SoA-Blog/July-2022/Using-archives-in-writing
I used archives extensively for both my books: “Daughters of the North” involved reading 16th century letters and documents, while “Josephine Tey” involved a wide variety of 20th century archives.
“During the pandemic, many libraries and archives were closed completely, and even now are only reopening slowly: the lockdowns made me appreciate how fantastic the access to these resources really is, and how they should be celebrated – and used…”