 A book like this to try to write it, say, 30 years ago would have been almost impossible because you would have had to visit so many places in person and go through boxes of documents. It would have taken an enormous amount of time. Now, with things being digitized in the way that they are, I mean, you can just go and get people to give you scans, right? So that's much easier. Now, the main thing, though, that I found, which was, I think, the most helpful source