 A 1617 decree issued in his capacity as Viceroy, ("Don Francisco de Boria Principe de Esqvilache Conde de Mayalde Gentilhombre dela Camara del Rey Nuestro Señor Su Vírrey lugar teníente, Gouernador, y Capitan General") is held by the National Library of Peru.On the death of his patron, Philip III, Borja y Aragón returned to Spain, embarking on December 31, 1621.There he dedicated himself to poetry, reworking and publishing some of the poems of his youth and writing new works in verse and prose.