Unknown currency

I found a portion of an unknown bill in a book from the 1830's. Many of the handwritten notes in the book are from around 1880. I also found on this forum the plates that match this bill- but the discussion there does not have a conclusion of what type of bill it is. (including the link to that discussion as well) Thoughts? (post with plates https://www.collectorsweekly.com/stories/291209-possible-forgery-plates?in=liked-this-month)