I don't know if this one song can be downloaded, but David Grisman lets people have a couple of song off each album. If not, you could buy the CD. It is a gem. Grisman has a third sense as to what other musicians are thinking, which show in the way he works (-ed) with Jerry Garcia, Vassar Clements, Tony Rice and others.

Mill Valley Waltz is on "Tone Poems" and is AC-10.

                     Acoustic Disc website