In the 1580s this Spanish novelist reportedly wrote 20 to 30 plays, but only "The Traffic of Algiers" & "Numantia" survive
...... Cervantes also wrote some 20 to 30 plays, of which The 
Traffic of Algiers,... [DOC] [TLE] Untitled [PAR] The first author listed in Timetables of World Literature is from the seventh .... etry 
were known to the ancient world, but of these only four ...... Cervantes also wrote 
some 20 to 30 plays, of which The Traffic of Algiers, Eight New Comedies and 
Eight New Interludes, and Numantia survive.