But, whether as the sister or the mother of a convent, Juana Ines de la Cruz was more than a mistress of vain learning or unprofitable science. Her daily assiduous exercise was charity, which at last so controlled her life and thoughts that she gave all her musical and mathematical instruments, all the rich presents which her talents had attracted from illustrious people, and all her books, excepting those she left to her sisters, to be sold for the benefit of the poor. Though she had evidently prized science as the handmaid of religion, the time came when her verses upon the vanity of learning reflected a mind more and more withdrawn from the affairs of this world to the contemplation of the next. When an epidemic visited the Convent of San Geronimo, and but two out of every ten invalids were saved, the good, brave soul of Madre Juana shone transcendently. Spite of warnings and petitions, and though all the city prayed for her life, Madre Juana perished at her vigil of charity--the good angel as well as muse of Mexico. Of the enthusiasm created by her genius, we have abundant and curious proofs. Don Alonzo Muxica, "perpetual Recorder of the City of Salamanca," wrote a sonnet upon her having learned to read at the age of three, when "what for all is but the break of morn in her was as the middle of the day." Excelentissimo Sir Felix Fernandez de Cordova Cordona y Aragon, Duke of Seffa, of Væna and Soma, Count of Cabra, Palomas, and Olivitas, and Grand Admiral and Captain-General of Naples, speaks of her in a lofty poetic encomium as for the third time applauded by two admiring worlds of readers, and praises her persuasive voice as that of a sweet siren of thought. Don Garcia Ribadeneyra, with the grandiose wit of his day, says in a decima that this extraordinary woman surpassed the sun, for her glorious genius rose where the sun set, that is to say, in the West; and Don Pedro Alfonso Moreno argues piously that St. John the Baptist's three crowns of Virgin, Martyr, and Doctor were in measure those of Madre Juana, who was from early years chaste, poor in spirit, and obedient, according to the vow of religious women. Don Luis Verdejo declares that she transferred the lyceums of the Muses to Mexico, and that the light of her genius is poured upon two worlds. Padre Cabrera, chaplain of the Most Excellent Duke of Arcos, asserts that the Eternal Knowledge enlightened Juana in all learning. "Only her fame can define her," writes one of her own sex; and when the Poetess of the Cloister wrote with her own blood a protestation of faith, it was said of this "Swan of erudite plume" that she wrote like the martyr to whose ink of blood the earth was as paper. Her gift of books to be sold in order to relieve the poor inspired Señora Catalina de Fernandez de Cordova, nun in the Convent of the Holy Ghost in Alcara, to say thus thoughtfully: