If I'm being honest, I can't say I knew much about any of these. Thank you so, so much for this list of links. I think you're 100% right, there are definitely lessons in there, and it's important that we don't let what was lost and forgotten get left behind in our history. We don't often, for instance, think about an h7 element (and similarly, that a blackface element was ever even considered is atrocious). So, long story short, I wasn't originally planning on it, but you've got my interest fully piqued. I'll be diving into these links soon.
Alternatively, I publish guest posts from time to time on the newsletter, and if it's something you're fascinated with and would want to share a bit about, I'd be happy to include it. If that's something that interests you, please do get in touch (firstname.lastname@example.org)!