Frankenstein: Chapter 22

This pretty much confirms that whoever is sending these is going backwards through the book. Are they trying to tell us that this is the end of their story, and that the beginning hasn't been told yet?

I had unchained an enemy among them whose joy it was to shed their blood and to revel in their groans. How they would, each and all, abhor me and hunt me from the world did they know my unhallowed acts and the crimes which had their source in me!