Free fantasia in the same style as the 2 preceding. Begins with obscure imitation of incipit (theme 1), and after entries in the other 2 voices, moves on to new music in free polyphony with favorite motive introduced at 37-47 as theme 2 in imitation.
New music then to end in typical Valderrabano style with erratic voice leading and entries, and haphazard whim. Registration is good eg. 15-20 at end of opening statements.

133 compases.