Caleb Crain revisits the to me utterly fascinating question of how John Keats actually talked.
(This post is a nice small example of how Caleb uses his blog to organize and annotate his more official publications.)
Also recommended: Lynda Mugglestone's Talking Proper: The Rise of Accent as Social Symbol. And there is a magical essay by Peter Holland, "Hearing the Dead: The Sound of David Garrick," in Players, Playwrights, Playhouses.
Bonus link: Marco Roth has a really lovely piece at n+1 about Caleb's self-published collection of blog posts The Wreck of the Henry Clay.