During his viceroyalty, the medicinal properties of quinine were discovered at Lima.

15. Pedro de Toledo y Leyta, Marquis of Mancero. Dec. 15, 1639-.

16. Garcia Sarmiento de Sotomayor, Count of Salvatierra. -June 26, 1659.

17. Luis Enrique de Guzman, Count of Alba de Liste. June 26, 1659-.

18. Diego Benavides y de la Cueva, Count of Santisteban. -1666.

19. Pedro Fernandez de Castro, Count of Lemu. 1666-1672.

20. Baltazar de la Cueva Enriquez. 1672-.

21. Archbishop Melchor Liñan y Cisneros.

22. Melchor de Navarra y Rocaful.

23. Melchor Portocarrero, Count de la Monclova. -Sept. 22, 1705.