But this is no different from practice, he told himself.

He feinted to the white-robed man's left, then jumped forward, lifting his sword high and bringing the flat of it down with all his strength on the hand that held the dagger. The dagger tumbled through the air. Simon saw at once that the man had no martial skill.

The madman darted forward in a crouch to retrieve his dagger, and as he did so Simon kicked him in the chin. The thick beard protected the man's chin from the full force of Simon's pointed leather boot, but he staggered. Before the bearded man recovered himself, Alain de Pirenne charged out of the crowd, seized him in a bear hug, and wrestled him to the ground.

"Ex Tartari furiosi!" The shouts rang out again and again as the pope's guards dragged the would-be assassin out of the church.

Simon saw Pope Urban shake his bare white head slowly, then turn back to the high marble altar and raise the Host overhead once more.

De Verceuil and Friar Mathieu reached Simon at the same time.

The cardinal held out his hand for the dagger, which Simon had retrieved, and studied it. "One could buy a hundred like it in any marketplace," he said, keeping his voice low now that the mass had resumed. He thrust the dagger into his black leather belt with a shrug.

"The white robe and sandals are the mark of the Apostolic Brethren," said Friar Mathieu. "Heretics who preach the doctrine of Joachim of Floris about a coming new age of enlightenment and equality."

"When it comes to heresy," said de Verceuil with an unfriendly grin, "there is little to choose between the Apostolic Brethren and the Franciscans. Many of your brethren are secret Joachimites."

"Of course, he might have been dressed that way only to deceive us," Friar Mathieu went on, ignoring the insult.