When I found myself at the Hathi Trust site, I (unintentionally) took a break from building the THP Bazaar site…
One of the built-in keyword search phrases is “type and type-founding.” This link leads to recent monographs on typography in general—very disappointing. When I tried “type-founding” and sorted the results oldest first, I discovered a jackpot!
In general, so far I have downloaded only the specimen indices and a few other pages of special interest. These resources may supply working specimens for future revival projects. Enjoy!
*Hathi allows visitors not authorized by registered institutional partners to download this entire catalog. This is the first time I have noticed this option. Usually, downloads are limited to only one page at a time.