Whittaker is getting over-excited. The National Library of Scotland's Digital Gallery is that good!
Right now, he has found the Caledonian Pocket Companion - all the notes, nice and clear, for a multitude of 18th century famous Scottish tunes. What's not to love?! And you can download the whole thing.
Here's 'The lass of Patie's Mill'
And here's the whole Digitized Gallery Special Collections of Printed Music. If you need historic Scottish music, this is a fabulous place to start. It's really useful for our AHRC Bass Culture project, too.)