Here's a #HistoricalLinguistics result I got in 2019, and haven't had a chance to present at a conference yet! You may think of left dislocation ("L'état, c'est moi!") and right dislocation ("Ils sont fous, ces Romains!") as features of contemporary #French but I found evidence of widespread use in early nineteenth-century theater - and much more!
It's in Chapter 6 of my 2019 book; let me know if you have difficulty getting ahold of it!
https://link.springer.com/chapter/10.1007/978-3-030-32402-5_6