I've uploaded four of Valderrabano's 'primero grado' sonetos: [1]http://www.vihuela.eu/study.htm really excellent fantasias and nowhere near as difficult as those by Fuenllana, Narvaez, Mudarra, etc.
Rob -- References 1. http://www.vihuela.eu/study.htm To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html