Interesting find. Makes me once again wonder what other previously thought to be lost treasures are sitting, hidden from the general public, out there on private shelves or in private collections.
Or even on the shelves of famous libraries - one of my favorite historical finds in recent decades was Deborah Harkness's discovery of John Dee's "Book of Soyga" (an Elizabethan occult text written in code and thought to have been lost). Turns out it had been sitting on a shelf in the Bodleian Library for centuries, unnoticed and uncatalogued.
