Angela watched him walking around the handful of cars parked outside, glancing into each of them, then stepped through the door as Bronson pulled the hire car to a halt just outside.
'So if the words aren't encrypted, how can there be a message in the text?' he asked, as he pulled out on to the main road.
'Instead of an alphabetic substitution, you can use word substitution. You choose particular words to mean something completely different. The Islamic terrorist groups have been doing this for quite some time. Instead of saying something like "We will plant the bomb at three this afternoon" they say "We will deliver the fruit at three this afternoon".'
'So the sentence still makes sense, but the apparent meaning is entirely different to its real meaning,' Bronson said.
'Exactly. Shortly before the attack on the World Trade Center, the lead terrorist, Mohammed Atta, contacted his controller and passed him a message that made no sense to the American security forces at the time. He used a sentence that included a phrase something like "plate with one stick down, two sticks". With a bit of imagination, you can see that he meant the numbers "9" and "11". He was actually telling his al-Qaeda contact the exact date when the attacks on America were going to take place.'
'And on this tablet?'
Angela shook her head in the darkness of the car, the headlamps boring a tunnel of light down the almost empty road in front of them. 'I don't think there's anything like that incorporated in the text, simply because the sentences don't make sense.'
She paused as she looked through the side window at the clear night sky. Casablanca was now several miles behind them, and away from the light pollution of the city, the stars looked brighter and closer, and far more numerous, than she'd ever seen them. She glanced back at Bronson, glimpsing his strong profile in the faint light cast by the jade-green illumination of the dashboard instruments.
'But there's one possibility that we haven't even considered,' she said.
25
Izzat Zebari waited until after one in the morning, when the lights in the house had been switched off for well over an hour, before he walked across to the double steel gates and lobbed two large raw steaks into the compound beyond. Melting back into the darkness, he heard a low growl and the swift patter of clawed feet as the two guard dogs ran out of their kennels to investigate the intrusion.
'How long before it works?' Hammad asked, as Zebari slid down into the passenger seat of the car they'd parked in a deserted side-street about a hundred metres away.
Hammad would deal with any burglar alarms or other electronic devices they encountered at the property. On the floor beside him was a small fabric case that held specialist tools and other equipment. Zebari knew that because Hammad had opened and checked the contents at least six times since they'd returned to the car. They'd cautiously walked down from the hillside just after darkness fell, and had been waiting in the vehicle ever since.
'Half an hour should do it,' Zebari replied. 'We just have to wait for the drugs to do their work. My chemist friend calculated the dose very carefully.'
Zebari waited another forty-five minutes before he gave the order to move. They climbed out of the car, easing the doors closed as carefully and quietly as they could, then opened the boot to remove the rest of their equipment. The biggest single item was a collapsible ladder long enough to reach the top of the boundary wall of the property.
Minutes later, they were crouched beside the wall, their all-black clothing making them almost invisible in the darkness. Swiftly Hammad and Zebari assembled the ladder, quietly slotting the sections together, then rested the base on the ground. The other end of the ladder was padded with cloth, and made no sound as Zebari leant it against the top of the wall.
'OK, up you go,' Zebari whispered.
Hammad climbed silently almost to the top, where he carefully examined the wall. He shone a pencil torch in both directions along it, the narrow beam barely visible. Next, he removed a spray can from his fabric bag and depressed the nozzle, aiming the jet at the area directly above the top of the wall, at the point where they would have to climb over it. Then he descended again.
'No wires or pressure-pads on top of the wall, no infrared sensors and no lasers,' he reported.
'Excellent,' Zebari muttered. 'They probably just rely on the dogs. Let's go.'
The two men ascended the ladder and climbed on to the top of the wall to sit with their legs astride it. Then Hammad lifted the ladder up and lowered it to the ground inside the courtyard.
They descended swiftly, and Zebari jogged round to the front of the house to check that the two dogs were sleeping peacefully. Then they ran together towards the rear of the property.
In the centre of the back wall of the house was a substantial ancient wooden door, decorated with a random pattern picked out in steel studs and fitted with a massive old lock. Zebari pointed at it, but Hammad shook his head decisively.
'Possibly alarmed,' he said, and turned his attention to the windows on either side. Like those in many Moroccan houses, these were square and quite small, as a protection against the intense heat of the sun. Hammad stood on tiptoe and used his pencil torch to carefully inspect the frame, checking for wires or contacts that might be linked to an alarm system.
'There it is,' he muttered. 'A simple break–no-break contact if the window's opened, but there's no sensor on the glass. I'll go in that way so I can open the back door from the inside.'
He stepped down from the window, took out a roll of sticky tape and plastered several lengths on the centre of the pane, leaving a short length sticking out that he could hold on to. He ran a diamond-tipped glass cutter firmly around the very edge of the glass, as close to the window frame as possible, and then rapped on the edge of the pane with his fist. With a cracking sound, the entire pane of glass shifted inwards and Hammad was able to slide it out of the frame. No alarms sounded.
He placed the glass against the wall a safe distance away and then, with Zebari's help, he hoisted himself up and wriggled through the frame and into the property. Zebari passed him the fabric bag of tools, and waited.
Less than three minutes later, having disabled the alarm system, Hammad unlocked the back door of the house and swung it open just wide enough for Zebari to slip inside.
Zebari led the way down a short corridor, Hammad checking each door carefully for wires or any other sign of an alarm system before opening it, and using a torch to check the rooms. The third door he opened led into a long room with cabinets along all four walls: it looked like an exhibition room in a museum.
'Show me the picture again,' he muttered, flashing the beam from his pencil torch over the rows of wooden cabinets, their glass fronts reflecting the light around the room.
Zebari pulled an A4-size colour print from his pocket, unfolded it and passed it over. Dexter had sent him the picture by email the previous evening.
For a few seconds, Hammad stared at the image on the paper, then nodded and stepped across to the first of the cabinets on his right. Zebari turned left and began his own search.
Four minutes later, it was clear to both of them that the tablet wasn't on display in any of the cabinets in the room.
'What now?' Hammad hissed.
'We keep on looking,' Zebari told him, leading the way out of the room and further down the corridor.
At the very end was a set of double doors. Zebari opened them and stepped into the room.
'There,' he breathed, and pointed.
The room was obviously used for meetings or perhaps social gatherings. Strewn across the floor were roughly twenty large cushions, upon which guests could sit comfortably cross-legged in the traditional Arab fashion. Decorating the plain white walls were a number of rugs and tapestries, evidently old and very valuable. But what had caught Zebari's attention was a single glass-topped cabinet located at one end of the long room.