The correspondence 1 of P. J. Proudhon, the first volumes of which we publish to-day, has been collected since his death by the faithful and intelligent labors of his daughter, aided by a few friends. It was incomplete when submitted to Sainte Beuve, but the portion with which the illustrious academician became acquainted was sufficient to allow him to estimate it as a whole with that soundness of judgment which characterized him as a literary critic.