Note that the annotation is alignable with images of the original manuscript, which are online at the Library of Congress. I.e. https://www.loc.gov/item/2021667850/
The [orig] contains all the original token and line breaks.
That's really cool. I went deep into epigraphy when I lived in Guatemala and was regularly finding carved pottery in our garden beds. Spent a lot of time annotating paper copies of glyphs.
The repo is kind of messy, it's mostly me and some students working on it, but we're pretty passionate. Let me know if you'd like to get involved! :)