Two of the dramas contained in The Purgatory of St. Patrick are the most celebrated of all Calderon's writings. The first, "La Vida es Sueno", has been translated into many languages and performed with success on almost every stage in Europe but that of England. So late as the winter of 1866-7, in a Russian version, it drew crowded houses to the great theatre of Moscow; while a few years earlier, as if to give a signal proof of the reality of its...