Thanks for the input. So far so good, at least on the first book. It either has footnotes or directly references the records it cites within the text. It is also matching up with the documented history of the period. I have added names for a couple of generations and Ancestry almost immediately found records for them. Some not so great (like those derived from family trees,) but others were marriage records that confirmed birth and marriage as well as parents names that lined up perfectly. At least as close to perfect as we can hope for in genealogical records from so long ago.

Now I just have to decide how to cite the books as sources. Part of me wants to copy excerpts of the PDFs and upload them. The books were free in the Google archives so there is no worry about copyright. But that could turn into a huge job as some of the books have 300 to 500 pages which would be a lot of excerpting. The reasonable (and lazy) part of my brain is telling me: "Just list the book title, author, year, publisher, and maybe the page number." Even if I were to excerpt the books, I'd still need to attach all that information to each file.