workshops perched on the undulating roof of the basilica like a lost corner of old Rome. Cecchi was a compact, muscular man of about fifty with the face of a gargoyle: thin, splayed ears protruding prominently from a bulbous skull topped by a shock of short wavy hair like white flames. Grimaldi explained the situation. With a sigh, Cecchi picked up a torch and led them up a short flight of steps on the outside of the dome. As they waited for Cecchi to find the right key on the huge bunch he produced from the pouch of his blue overalls, Zen studied a large crack in the wall. A number of marble strips had been bridged across it to keep track of its progress, the earliest being dated August 1835. He was not reassured to note that all the tell-tales were broken.
Inside the door, a ramp led up to a door opening on to the internal gallery at the base of the drum. The roof outside gave such a strong illusion of being at ground level, with its alleys and piazzas, its washing lines and open casements, that it was a shock to realize just how high they were. Zen peered through the safety fence at the patterned marble floor over a hundred and fifty feet below. The fence ran inside the original railings, all the way from the floor to a point higher than Zen’s head, closing off the half of the gallery which was open to the public.
‘This is supposed to stop jumpers,’ Cecchi explained, shaking the mesh with his powerful fingers.
‘This one went off the other side,’ put in Grimaldi.
He pointed across the circular abyss to a door set in the wall of the drum opposite, giving on to a section of the gallery that was not open to the public, and hence was protected only by the original railings.
‘The stairs leading down from the top of the dome pass by that door,’ Grimaldi explained. ‘The door’s kept locked, but he somehow got hold of a key.’
Zen frowned.
‘But he would have been seen by anyone standing over here.’
‘The dome was closed by then. This part of the gallery would have been shut and locked. Only the exit was still open.’
Zen nodded.
‘Sounds all right. Let’s have a look round the other side.’
Cecchi led the way along a corridor which ran around the circumference of the dome in a series of curved ramps. When they reached the doorway corresponding to the one by which they had left the gallery on the other side, the building superintendent produced his keys again and unlocked the door. Zen pushed past him and stepped out on to the open section of the gallery. The finger he wiped along the top of the railing came away covered in dust.
‘They don’t bother cleaning here,’ Cecchi remarked. ‘No call for it.’
Halfway between the gallery and the floor, the roof of the baldacchino rose up towards them, surmounted by a massive gold cross. Bernini had not envisaged his showpiece being seen from this angle, and it had an awkward, clumsy look, like an actress glimpsed backstage without her costume or make-up. Immediately underneath the gallery ran a wide strip of gold, like an enormous hatband, with a Latin inscription in blue capitals: TV ES PETRVS ET SVPER HANC PETRAM EDIFICABO ECCLESIAM MEAM. The air was filled with a sonorous squealing as the staff, far below in the body of the nave, manoeuvred the heavy wooden benches into place for the papal Mass. It reminded Zen of the sirens of fog-bound shipping in the Venetian lagoons.
Telling Cecchi and Grimaldi to wait there, he walked round this semi-circular section of the gallery, inspecting the railing and floor carefully. He sighed heavily and consulted his watch. Then he leant over the railing, looking up at the sixteen frescoed segments into which the interior of the dome was divided. Beneath each segment was a huge rectangular window consisting of thirty enormous panes, like a monstrous enlargement of an ordinary casement. The glass was dark and glossy, reflecting back the glare of the floodlights which Cecchi had turned on as they entered the dome. Each pair of windows was separated by a double pilaster whose cornices supported a ledge topped with what looked like railings.
Zen walked back to the waiting Vatican employees.
‘Is there another gallery up there?’ he asked.
Cecchi nodded.
‘It’s locked, though.’
‘So was this one.’
‘He had a key to this one,’ said Grimaldi, as though explaining the obvious to a child.
Zen nodded.
‘I’d like to have a look at the upper gallery, if that’s possible.’
Cecchi sighed heavily.
‘It’s possible, but what’s the point? There’s nothing to see.’
‘That’s what I want to make sure of,’ Zen replied.
On the landing outside, two doorways faced one another. The one on the right was the lighted public way leading down from the lantern. Cecchi turned to the other, a locked wooden door. After searching through his keys for some time, he opened it, revealing yet another ramp curving upwards into darkness. The ramp ended at a narrow spiral staircase bored through the stonework between the gargantuan windows. At the top, another door gave access to a second gallery in the floodlit interior of the dome, sixty feet above the lower one.
Zen looked over the railing at the vertiginous prospect below. From here, the tarpaulin was a mere scrap of blue. Again he told Grimaldi and Cecchi to wait while he walked slowly round the ledge, running his finger along the top of the railing and examining the floor. He had gone about a quarter of the way round when he stopped abruptly and glanced back at the other two men. They were standing near the door, chatting quietly together. Zen bent down beside the object which had caught his attention. It was a black brogue shoe, resting on its side between two of the metal stanchions supporting the railing. The toe, its polish badly scuffed, protruded several inches over the void.
A moment later he noticed the twine. Thin, colourless, almost invisible, it was tied to one of the stanchions against which the shoe rested. The other end dangled over the edge of the gallery. Zen pulled it in. There were several yards of it. He got out his lighter and burned through the twine near the knot securing it to the metal post. Straightening up again, he stuffed the twine into his pocket with the plastic bag in which the perfume had been wrapped.
Looking over the railing, he studied the scene below. The workmen were still shifting benches further down the nave, but the area below was deserted. With a gentle kick, Zen eased the black shoe off the edge of the gallery and watched it tumble end over end until he could make it out no longer. Whatever sound it made as it hit the floor of the basilica was lost in the squealing and honking of the benches. Rubbing his hands briskly together, Zen completed his circuit of the gallery, returning to the spot by the door where Grimaldi and Cecchi were in conversation.
‘Quite right,’ he told the building superintendent. ‘There’s nothing to see.’
Cecchi sniffed a told-you-so. Zen tapped Grimaldi’s two-way radio.
‘Does this thing work up here?’
‘Of course.’
‘Then get hold of Lamboglia and tell him to meet me by the body in ten minutes.’
He glanced at his watch again.
‘And then call a taxi to the Porta Sant’ Anna,’ he added.
When Zen and Grimaldi emerged into the amplitude of the basilica, like woodlice creeping out of the skirting of a ballroom, Monsignor Lamboglia was waiting for them. Zen regretted not having paid much attention to Sanchez-Valdes’s secretary earlier, since it meant dealing with an unknown quantity at this crucial juncture. If he played it smart, he could be back in bed with Tania in half an hour. He therefore studied the cleric as he approached, trying to gather clues as to how best to handle him. Lamboglia’s gaunt, craggy face, a mask of gloomy disapproval which looked as though it had been rough-hewn from granite, gave nothing away. But the rapid tapping of his fingers and the darting, censorious eyes betrayed the testy perfectionist who loved catching inferiors out and taxing them with inconsequential faults. It was this that gave Zen his opening.
‘Well?’ demanded Lamboglia brusquely, having dismissed Grimaldi with a curt wave of the hand.
Zen shrugged.
‘More or less, yes. Apart from the business of the shoes, of course.’
Lamboglia’s lips twisted in disapproval and his eyes narrowed.
‘Shoes? What do you mean?’
