THREE

       Drumlanrig Castle, Scotland

       18th April – 12.07 p.m.

      It seemed less a castle than a mausoleum to Tom; a place of thin shadows, cloaked with a funereal stillness, where muffled footsteps and snatched fragments of hushed conversations echoed faintly along the cold and empty corridors.

      It was an impression that the furnishings did little to dispel, for although the cavernous rooms were adorned with a rich and varied assortment of tapestries, gilt-framed oil paintings, marble-topped chests, rococo consoles and miscellaneous objets d’art, closer inspection revealed many of them to be worn, dusty and neglected.

      ‘This place reminds me of an Egyptian tomb,’ Tom whispered. ‘You know, stuffed full of treasure and servants and then sealed to the outside world.’

      ‘It’s a family home,’ Dorling reminded him. ‘The Dukes of Buccleuch have lived here for centuries.’

      ‘I wonder if they’ve ever really lived here or just tended it, like a grave?’

      ‘Why don’t you ask them? That’s the Duke and his son, the Earl of Dalkieth,’ Dorling hissed as they walked past an old man being supported by a younger one. Both men nodded at them solemnly as they passed by, their faces etched with a mournful, almost reproachful look that made Tom feel as though he had invaded the privacy of an intimate family occasion. ‘Poor bastards look like somebody died.’

      ‘That’s probably how it feels.’ said Tom sympathetically. ‘Like somebody who has been a member of their family for two hundred and fifty years has suddenly dropped down dead.’

      ‘It’s much worse than that,’ Dorling corrected him, eyebrows raised playfully. ‘It’s like they’ve died and left eighty million quid to the local cat’s home.’

      The hall had been sealed off; a square-shouldered constable was standing guard. From behind him came the occasional white flash and mechanical whir of a police photographer’s camera. Tom felt his chest tighten as they stepped closer, Dorling’s words echoing in his head: ‘He’s left you something.’

      The disturbing thing was that Milo and he had always had a very simple agreement to just keep out of each other’s way. So something serious must have happened for Milo to break that arrangement now, something that involved Tom and this place and whatever was waiting for him on the other side of that doorway. The easy option, Tom knew, would have been to refuse to take the bait, to walk away and simply ignore whatever lay in the next room. But the easy option was rarely the right one. Besides, Tom preferred to know what he was up against.

      Seeing Dorling, the constable lifted the tape for them both to stoop under. To Tom’s right, some forensic officers in white evidence suits were huddled next to the wall where Tom assumed the painting had been hanging.

      ‘There’s nothing here,’ Tom almost sounded relieved as he glanced around. Knowing Milo as he did, he’d feared the worst.

      Dorling shrugged and then motioned towards two men who were standing at the foot of the staircase. One of them was speaking to the other in a gratingly nasal whine, a shapeless grey raincoat covering his curved shoulders. The corners of Tom’s mouth twitched as he recognised his voice.

      ‘It was opportunistic,’ the man pronounced. ‘They walked in, saw their chance and took it.’

      ‘What about the little souvenir they left behind?’ the other man queried in a soft Edinburgh burr. ‘They must have planned that.’

      ‘Probably smuggled it in with them under a coat,’ Dorling agreed. ‘Look. I’m not saying they didn’t plan to come here and steal something, just that they weren’t that bothered what they took. Probably wouldn’t know who da Vinci was if he jumped up and gave them a haircut.’

      ‘Would you?’ Tom interrupted, unable to stop himself, despite Dorling’s earlier warning.

      The man swivelled round to face him.

      ‘Kirk!’ He spat the name through clenched teeth, yellowing eyes bulging above the dark shadows that nestled in his long, sunken cheeks. His skin was like marble, cold and white and flecked with a delicate spider’s web of tiny veins that pulsed red just below the surface.

      ‘Sergeant Clarke!’ Tom exclaimed, his eyes twinkling mischievously. ‘What a nice surprise.’

      Tom could no longer remember quite why Clarke had made it his personal mission to see him behind bars. It was a pursuit that had at times verged on the obsessive, Clarke’s anger mounting as Tom had managed again and again to slip from his grasp. Even now, he refused to believe that Tom had gone straight, convinced that his newly acquired respectability was all part of some elaborate con. Still, Tom didn’t mind. If anything he found Clarke mildly amusing, which seemed to make him even angrier.

      ‘It’s Detective Sergeant Clarke, as well you know,’ Clarke seethed, the sharp outline of his Adam’s apple bobbing uncontrollably. ‘What the hell are you doing here?’

      ‘I invited him,’ Dorling volunteered.

      ‘This is a criminal investigation,’ Clarke rounded on him. ‘Not a bloody cocktail party.’

      ‘If Tom’s here, it’s because I think he can help,’ Dorling replied tersely.

      ‘For all you know, he nicked it himself,’ Clarke sneered. ‘Ever think of that?’

      The man standing next to Clarke turned to Tom with interest.

      ‘I don’t believe we’ve met.’ He was about fifty years old, tall, with wind-tanned cheeks, moss green eyes and a wild thatch of muddy brown hair that was thinning from the crown outwards.

      ‘Bruce Ritchie,’ Dorling introduced him to Tom. ‘The estate manager. Bruce, this is Tom Kirk.’

      Tom shook Ritchie’s outstretched hand, noting the nicotine stains around the tips of his fingers and the empty shotgun cartridges in his waxed jacket that rattled as he moved his arm.

      ‘I take it you have some direct … experience of this type of crime?’ He hesitated fractionally