"What time do you enter the Vatican?"

"I'm expected at the Bronze Doors at six o'clock this evening. Customarily, Father Donati greets me there and escorts me up to the third floor, to the papal apartments."

"Are you certain this man Donati is to be trusted?"

"I have known Father Donati as long as I have known the Holy Father. He is intensely loyal."

Shimon Pazner entered the room and handed Tiepolo a cup of espresso.

"It is important that the Pope and his aides feel comfortable," Shamron resumed. "We will meet with His Holiness under any circumstances of his choosing. Obviously, we would prefer a secure location, someplace where our presence will not be noted by certain elements of the Curia. Do you understand what I'm trying to say to you, Signor Tiepolo?"

Tiepolo raised the coffee to his lips and nodded vigorously.

"The information we wish to pass to the Holy Father is of a sensitive nature. If necessary, we will meet with a trusted aide, but we believe it would be best for the Pope to hear it with his own ears."

Tiepolo swallowed the espresso in a gulp and set the cup gently on the saucer. "It would be helpful to me if I had some idea of the nature of this information."

Shamron allowed his face to register discomfort, then he leaned forward. "It concerns the actions of the Vatican during the Second World War and a meeting that took place in a convent on Lake Garda a long time ago. You'll forgive me, Signor Tiepolo, if I say no more."

"And the nature of the threat to his life?"

"We believe the threat to the Holy Father originates from forces inside the Church, which is why he needs to take additional steps to protect himself and those around him."

Tiepolo inflated his cheeks and expelled the air slowly. "You have one thing working to your advantage. Father Donati has told me on any number of occasions that he is concerned about the security around the Holy Father. So this will come as no surprise to him. As for the war--" Tiepolo hesitated, clearly choosing his words carefully. "Let me just say that it is a topic to which the Holy Father has given a great deal of thought. He calls it a stain on the Church. A stain that he is determined to remove."

Shamron smiled. "Obviously, Signor Tiepolo, we're here to help."

AT 5:45 P.M., a black Fiat sedan pulled up outside the entrance of the apartment house. Francesco Tiepolo settled himself in the backseat. Shamron and Shimon Pazner appeared briefly on the terrace and watched the car set out along the river toward the dome in the distance.

Fifteen minutes later, the Fiat deposited the Venetian at the entrance of St. Peter's Square. Tiepolo slipped through the metal guard barrier and made his way along Bernini's Colonnade as the bells of the Basilica tolled six o'clock. At the Bronze Doors, he presented his name and Italian identity card to the Swiss Guard. The Guard consulted a clipboard, then compared Tiepolo's face to the photograph on the identity card. Satisfied, he allowed Tiepolo to enter the Apostolic Palace.

 Father Donati was waiting at the foot of the Scala Regia. As usual, he wore a grim expression, like a man perpetually bracing himself for bad news. He shook Tiepolo's hand coldly and led him upstairs to the papal apartments.

As always, Tiepolo was taken aback by the appearance of the papal study. It was a simple room--much too austere for so powerful a man, he thought--yet completely in keeping with the humble clergyman he had come to know and admire in Venice. Pope Paul VII was standing in the window overlooking St. Peter's Square, a white figure posed against the crimson drapery. He turned as Tiepolo and Father Donati entered the room and managed a fatigued smile. Tiepolo fell to his knees, kissing the fisherman's ring. Then the Pope took Tiepolo by the shoulders and guided him to his feet. He seized the Venetian by his biceps and squeezed, seemingly drawing strength from the bigger man.

"You look well, Francesco. Obviously life in Venice continues to treat you well."

"Until yesterday, Holiness, when I learned about a threat to your life."

Father Donati sat down, carefully crossed one leg over the other, and smoothed the crease of his trousers--a busy chief executive, eager to move the proceedings along. "All right, Francesco," Donati said. "Enough of the dramatics. Have a seat and tell me exactly what in God's name is going on."

POPE Paul VII was scheduled to dine that evening with a delegation of visiting bishops from Argentina. Father Donati telephoned the leader of the delegation, a prelate from Buenos Aires, and told him that unfortunately His Holiness was under the weather and would not be able to host the meal. The bishop promised to pray for the Holy Father's speedy recovery.

At nine-thirty, Father Donati stepped into the corridor outside the papal study and confronted the Swiss Guard standing watch. "The Holy Father wishes to walk in the gardens to meditate," Donati said briskly. "He'll be leaving in just a few moments."

"I thought His Holiness was ill this evening," the Swiss Guard replied innocently.

"How His Holiness is feeling is none of your concern." "Yes, Father Donati. I'll notify the Guards in the garden that His Holiness is coming."

"You will do no such thing. The Holy Father would like to meditate in peace."

The Swiss Guard stiffened. "Yes, Father Donati." The priest walked back to the study, where he found Tiepolo helping the Pope into a long fawn overcoat and brimmed hat. With the coat buttoned, only the fringe of his white soutane was visible.

There are a thousand rooms in the Vatican and countless miles of corridors and staircases. Father Donati had made it his business to learn every inch of them. He led the Pope past the Swiss Guard, then spent the next ten minutes winding his way downward through the labyrinthine passageways of the ancient palace--here a murky shoulder-width tunnel with a dripping arched ceiling, here a flight of stone steps, rounded by time, slick as ice.

Finally, they came to a darkened underground garage. A small Fiat sedan was waiting. The Vatican SCV license plates had been replaced by normal Italian tags. Francesco Tiepolo helped the Pope

 into the backseat and joined him there. Father Donati climbed behind the wheel and started the engine.

The Pope could not hide his alarm at this development. "When was the last time you drove a car, Luigi?"

"To be honest, Holiness, I can't recall. It was certainly before we came to Venice."

"That was eighteen years ago!"

"May the Holy Spirit protect us on our journey."

"And all the angels and saints," added the Pope.

Donati forced the car into gear and guided it timidly up a winding, darkened ramp. A moment later, the car emerged into the night. The priest hesitantly pushed the accelerator toward the floor and sped along the Via Belvedere toward St. Anne's Gate.

"Duck down, Holiness."

"Is that really necessary, Luigi?"

"Francesco, please help His Holiness conceal himself!"

"I'm sorry, Holiness."

The big Venetian grabbed the Pope by the lapels of his overcoat and pulled him down into his lap. The Fiat sped past the Pontifical Pharmacy and the Vatican Bank. As they approached St. Anne's Gate, Father Donati switched on his headlights and sounded his horn. A stunned Swiss Guard leapt out of the path of the speeding car. Father Donati made the sign of the cross as the car flashed through the gate and entered Rome proper.

The Pope looked up at Tiepolo. "May I sit up now, Francesco? This is most undignified."

"Father Donati?"

"Yes, I think it's safe now."

Tiepolo helped the Pope sit up and straightened his overcoat.

It was Chiara standing on the terrace of the safe flat, who spotted the Fiat entering the piazza. The car stopped in front of the building and three men climbed out. Chiara ducked into the sitting room. "There's someone here," she said. "Tiepolo and two other men. I think one of them might be him."