This was also interesting, speaking of ancient music. I hope non-subscribers to Smithsonian can access this link.

ancient music

"Rare" is a relative term, no?

It's not a book you can typically find out there in the used book market.

Have you looked at that PDF? The fellow who put it there says: "I couldn't check out the book, so I photographed the pages." And it looks like it.

I'm looking forward to someone coming along and re-typesetting the whole book. But until that time, it's good to have a handy edition available.

I'm looking forward to someone coming along and re-typesetting the whole book.

Some of us do that!

If you want the book retypeset I'm more than happy to do it.

Just found on GoogleBooks another scan of Cantus Mariales, HERE. This copy appears to be from 1906, but I'm otherwise not detecting much difference.

I would prefer to have an electronic version. I no longer buy books, but I do hoard pdfs. And I would love to have a GOOD pdf of Cantus Mariales.

Well done Andrew!