Found: Medieval Manuscripts Stolen From Italy, Hiding in the Boston Public Library

AtlasObscura:

The public library started looking into the provenance of the 14th century manuscript after a medieval manuscript expert working on a digitizing project “noticed that the book was not in its original wood-and-leather cover, and the chapter numbers had been scraped away,” the Globe reports. It was clear that at some point in the past, these clues to its origins had been removed on purpose. The manuscript expert, Lisa Fagin Davis, started looking for more information that might explain where the book had originally come from, and finally found a copy of the cover page in a Harvard library.