unnatural effort appears to have exhausted rather than exercised their strength. While the emperor triumphed at Constantinople or Jerusalem, an obscure town on the confines of Syria was pillaged by the Saracens, and they cut in pieces some troops who advanced to its relief; an ordinary and trifling occurrence, had it not been the prelude of a mighty revolution. These robbers were the apostles of Mahomet; their fanatic valor had emerged from the desert; and in the last eight years of his reign, Heraclius lost to the Arabs the same provinces which he had rescued from the Persians.