How far back in time can you understand English?

[ʗharlie ßowman]

The recent discussion about "translating" Middle English reminded me of this interesting little piece. The challenge is to see how far back you can read and comprehend English, with every section of the story going back 100 years in spelling, style, and typography. 

As a group of people who read very old books for fun, I thought you all might enjoy this as much as I did.

"How far back in time can you understand English?" - Dead Language Society