There's also sound samples pertaining to the transcriptions here:

http://www.johnwilliamsguitarnotes.com/from-a-bird/from-a-bird.html

Everything you need to get your JW classical chops going...

John Williams created this site in 2009, to coincide with the release of his CD "From a Bird". Here you can find 5 hand-written transcriptions of original compositions from the CD, plus the rhythmic "Musha Study" for ensemble. These, together with editorial/performace notes and sound samples, provide a fascinating insight into the guitarist as composer.