Not sure if this is what you're looking for but this is classic in the psychological community: https://www.google.com/books/edition/Letters_from_Jenny/iVQNAQA

Not sure if this is what you're looking for but this is classic in the psychological community: https://www.google.com/books/edition/Letters_from_Jenny/iVQNAQAAMAAJ?hl=en https://www.google.com/books/edition/Letters_from_Jenny/iVQN... It's been analyzed for personal themes etc and the subject of lots of methodological discussion over the years. The tricky part is that I'm not sure it's currently available in digitized form. It might be, or you might have to scan it and then read it with OCR. The other problem is copyright issues perhaps? Revisiting it with modern analysis methods would be pretty interesting actually now that I think about it.