The traditional practice of praying for St. Anthony's help in finding lost or stolen things is traced to an incident during his lifetime that occurred in Bologna. According to the story, Anthony had a book of psalms that was important to him, as it contained his notes and comments for use in teaching his students. A novice who had chosen to leave had taken the psalter with him. Prior to the invention of the printing press, any book was hand-copied, and thus, an item of high value; a Franciscan friar in particular, given his vow of poverty, would have found such an item difficult to replace. When Anthony realized his psalter was missing, he prayed it would be found or returned, after which the thief was moved to not only return the book to Anthony, but also return to the order. The stolen book is said to be preserved in the Franciscan friary in Bologna.