A great number of Work's songs (lyrics & MIDI) were at Benjamin Robert Tubb's Public Domain Music site, which unfortunately has closed. Tubb, however, says HERE:
My Public Domain Music (1800-1923) Website (The website is being relocated under the sponsorship of the Center for American Music at the University of Pittsburg, PA. Regrettably this move, as of 20 July 2002, will not be as seemless as I would like in regards to the downtime required for the move to become official. Please check back here occassionally for updated status.)
~Masato