Pope Leo XIII, born in 1810, is credited with being the founder of Catholic social teaching. (CNS/Library of Congress) By Carol GlatzCatholic News Service VATICAN CITY (CNS) -- Going by the pseudonym "X," Pope Leo XIII anonymously crafted poetic puzzles in Latin for a Roman periodical at the turn of the 19th century. The pope created lengthy riddles, known as "charades," in Latin in which readers had to guess a rebus-like answer from two or more words that together formed the syllables of a new word. Eight of his puzzles were published anonymously in "Vox Urbis," a Rome newspaper...