I'd love to see actual, authentic material that was rewritten through the years. One possibility is a passage from the Bible, though that's not usual English. Another is laws or other official texts - even if not exactly the same, they may be comparable. Maybe personal letters written from or to the same place about the same topic - e.g., from or to the Church of England and its predecessor about burial, marriage, or baptism.

The author Colin Gorrie, "PhD linguist and ancient language teacher", obviously knows their stuff. From my experience, much more limited and less informed, the older material looks like a modern writer mixing in some archaic letters and expression - it doesn't look like the old stuff and isn't nearly as challenging, to me.

Some early English translations of the Bible were unintentionally comical, e.g., “and Enoch walked with God and he was a lucky fellowe.”

Of course that’s not limited to the 16th century. The Good News Bible renders what is most commonly given as “our name is Legion for we are many” instead as “our name is Mob because there are a lot of us.” In my mind I hear the former spoken in that sort of stereotypical demon voice: deep with chorus effect, the latter spoken like Alvin and the Chipmunks.