THIS translation of what may be called the most popular of all Boudon's works, was undertaken with the desire of furthering the holy object for which it was written. One of the chief means for spreading devotion to the Holy Angels, is the distribution of well-selected books on the subject. "This means," he writes, "includes almost all the others, since it both gives them honour and teaches it." In the absence of any treatise on the due mode of honouring these blessed spirits, it is hoped that the present publication may be found a useful contribution to our devotional literature.