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.