Sor Juana Ines de la Cruz was born at San Miguel de Nepantla, twelve leagues from the city of Mexico, in the year 1651, and died at the age of forty-four. When but three years old, she was able to read, write, and "cipher," and at eight she wrote a prologue for the feast of the Holy Sacrament. Once she cut her hair, and would not allow it to grow till she had acquired the learning she proposed to herself, seeing no reason why a head should be covered with hair that was denuded of knowledge, its best ornament. After twenty lessons, it was said, she knew Latin, and so great was her desire to learn that she importuned her parents to send her to the University of Mexico in boy's clothes. When seventeen years of age, and a cherished inmate of the Viceroy Mancera's family, she amazed a large company of the professors and scholars of the capital by tests of her various erudition and abilities. Notwithstanding her beauty and fortune, her rank and accomplishments, and the life of a gallant and brilliant court, she determined at that early age to retire to a cloister, and in a few years became known as Sor Juana of San Geronimo, a convent of the city of Mexico. After this appeared her poems, _The Crisis_ and _The Dream_, in the latter of which she writes much of mythology, physics, medicine, and history, according to the scholastic manner of her time. With these and her subsequent poetic writings, such as her sonnets, loas, romances, and autos, she had rare fame, and won from some of her admirers the enthusiastic titles of "The Phœnix of Mexico," "Tenth Muse," and "Poetess of America." The writer has an old volume before him bearing literally this title-page: "Fama, y Obras Posthumas del Fenix de Mexico, y Dezima Musa, Poetisa de la America, Sor Juana Ines de la Cruz, Religiosa Professa en el Convento de San Geronimo, de la Imperial Ciudad de Mexico. Recogidas y dadas a luz por el Doctor Don Juan Ignacio de Castorena y Ursua, Capellan de Honor de su Magestad, y Prebendado de la Santa Iglesia Metropolitana de Mexico. En Barcelona: Por Rafael Figuero. Año de MDCCI. Con todas las licencias necessarias." Thus it appears we owe to the Prebendary Castorena the edition of the posthumous works of Sor Juana given to the light in 1701, six years after her death.