Biltmore

I noticed the Biltmore Estate in NC boasts over 20,000 books, with 10k or so being from the patriarch's original collection (including books from the 1500s!). They do not lend but I wonder if LT could get a copy of their catalog to just show what all he collected during the 1800s. It would be fascinating!

Lots of info at https://www.biltmore.com/blog/on-the-shelves-of-george-vanderbilts-library/ - from the comments it doesn't look like they're planning to release a catalog or a digital version of his reading lists, which is too bad - that's quite a cool resource!

There was a theft of some of their books during a movie shoot some years ago, but I believe they got them back eventually.