[Joseph The Grave]

I appreciate additional posters here continuing to try to help but did you guys miss my update above where I found a fix? Maybe it's not posting right and can't be seen for some reason. It was the way I was saving the ebook off the Gutenberg site that was the problem. Once I used my SingleFile save web page extension in my FF browser to save and import it into calibre, it worked fine. I now have a perfectly formatted epub ebook with working Table of Contents.

As for the OCR PDF to HTML thing I mentioned above, I think I had unrealistic expectations in what that would entail. I thought you could just use OCR software with no need of a scanner to convert a PDF ebook into HTML to create in Calibre an epub ebook, but I see now that it's much much more involved and intricate than that. Guess I'll just have to stick with those massive 400MB PDF ebooks I got off IA and perhaps find a way to reduce the size.