Music in Public Domain for the ukulele in the United States is not overly common.
As I wrote at an earlier date about my find of N.B. Bailey and Keoki E. Awai’s book of Ukulele Solos, I will not repeat myself here. However, I can see the post of “Pick Waltz” both as a pdf and GuitarPro 5 version is a favorite of blog visitors. Here is another fingerpicking exercise from Bailey and Awai’s book.
If you are into older ukulele books and hope to find a treasure in a bookstore, it could be a while before you find anything.
I was surprised when I visited Powell’s giant bookstore in Portland last Spring how few older music books there really were. For some reason I thought I might find the motherlode. But I did find a book (where did I put it?) on the baritone ukulele and thought of Humble Uker’s Baritonics site. So I bought the book and need to find it for him.
I have updated to GuitarPro 6 only to find it does not work with Tab Toolkit — unless they have recently updated Tab Toolkit. So again, if there’s a volunteer to type the music into GP format, I’ll add it here for all ukulele aficianados to download. Here is melody-in-F-Bailey.pdf
Update January, 2015: I have a newer post about this book complete with a link to a way to obtain the entire book. You can download free pdfs as a sample of what is in the book at my newer website. “Melody in F” is still available as a free download.