In those years the Tartars, invincible legions of mounted barbarians, had come out of Asia, invading the Islamic world. A huge army led by Hulagu, grandson of the Tartar conqueror, Genghis Khan, had already conquered Persia and Syria and was poised to attack Egypt. And Hulagu was sending ambassadors to the pope to urge Christian Europe to join with the Tartars in destroying the Muslims. Should Tartars and crusaders strike at Egypt simultaneously, the people and faith Daoud has come to love would perish. Daoud has seen with his own eyes how the Tartars obliterated Baghdad, its 200,000 men, women, and children slaughtered to the last soul, the city leveled, a wasteland. He is determined that the same fate not befall his adopted El Kahira. Baibars--having made himself Sultan of El Kahira--sent Daoud into the land of the infidel. Because Daoud is blond and gray-eyed, no one would ever suspect him to be a Saracen, as Christians call all Muslims. Daoud's mission was to go to the court of the pope and use every means necessary--from intrigue and bribery to assassination and outright war--to stop Christians and Tartars from forming an alliance against Islam. He went first to Manfred, king of southern Italy and Sicily. King Manfred's family, the imperial German house of Hohenstaufen, had been at war with the popes for generations, and Manfred had among his subjects many Sicilian Muslims. Manfred agreed to help Daoud. But to protect his own interests Manfred insisted that Daoud take with him Lorenzo Celino, a middle-aged Sicilian warrior, and Sophia Karaiannides, a beautiful Byzantine woman. Lorenzo brought along his huge, formidable dog, Scipio. Journeying northward, the three rescued Rachel, a Jewish girl, from tavern ruffians. Daoud agreed, with misgivings, to let her travel with them. The pope, threatened by political violence in Rome, had moved his residence to Orvieto, a strongly walled town built on a huge flat-topped rock. Here, Cardinal Adelberto Ugolini, a Sicilian churchman who had long been secretly sending information to Baibars, was horrified to find Baibars's agent on his doorstep expecting hospitality. But the cardinal reluctantly agreed to help. Hulagu Khan's ambassadors to the pope, Christianized Tartars named John Chagan and Philip Uzbek, arrived in Orvieto two weeks after Daoud. A young French nobleman, Count Simon de Gobignon, commanded their military escort. Daoud had arranged for garbage-throwing hecklers to mar the ambassadors' procession. The arrogant Cardinal Paulus de Verceuil, accompanying the Tartars, was hit by excrement. He ordered the hired Venetian crossbowmen to fire into the crowd, killing two innocent bystanders.