Raven's Gate

it was too much for him. He coughed painfully. Then his head fell back and his eyes closed.
    Holding the keys, Richard stood up. He could see Matt below him, some distance away, and knew what he was thinking. Right now there was a killer inside the museum. Someone – or something – had attacked Professor Dravid and they would surely be next. But what were they up against? Why couldn’t they see anything? Moving slowly now, Richard went back down the stairs, his every sense alert. The two of them were so small in this enormous place. He felt horribly exposed.
    “Did you get them?” Matt asked.
    “Yes.” Richard held up the keys. “Let’s get out of here.”
    “What about Professor Dravid?”
    “He’s dead. I’m sorry. There’s nothing we can do.”
    “But what killed him?”
    “I don’t know.” Richard gazed upwards, his eyes sweeping across the vaulted ceiling. “But let’s not stay to find out.”
    He turned and at that moment there was a sudden whirl in the air. Matt threw a protective arm across his face and staggered into Richard.
    “What’s wrong?” Richard demanded.
    “There was something…” Matt looked around him but there was nothing there. “Something flew near my head,” he insisted.
    “Flew?”
    “Yes.”
    “Did you see what it was?”
    “No. But I sensed it. It came so close… I felt it go past.”
    “I can’t see anything.”
    But then it dived towards them again, sweeping down out of the mist, and this time there could be no mistaking it, even if it took Matt precious seconds to work it out. Triangular and white, the creature was neither living nor dead, coming at them like something out of a hideous dream. It had eye sockets but no eyes, wings but no feathers, a bulging ribcage with nothing inside. Moving faster than ever, almost a blur, it shot down. Its claws were stretched out and its needle-sharp teeth were bared in an evil grimace. Matt fell back. He felt one of the wings shudder past his face and knew that if he had waited a second longer he would have been decapitated. Now he understood what had happened to Professor Dravid.
    Richard reached down and helped him up. “Did you see it?” he muttered.
    “Of course I did.”
    “You saw what it was?”
    “Yes!”
    “What?”
    “I don’t know.” Matt had recognized it but he couldn’t put it into words.
    “It’s a trick,” Richard said. “It has to be a trick. It wasn’t real.”
    They had been attacked by something that couldn’t fly, that couldn’t even exist. It was a creature that hadn’t been seen on the planet for many millions of years. A pterodactyl. Except that it wasn’t quite a pterodactyl. It was the fossilized skeleton of a pterodactyl, wired together and put on display at the Natural History Museum. It had been brought to life and now it was somewhere above them.
    “Look out!”
    Matt shouted the warning as the pterodactyl swooped down a third time, plummeting out of the gloomy heights of the hall and hurtling towards them. He had no doubt that the claws would rip his flesh away if he allowed them to make contact. The creature was as vicious as it had been when it had flown over the prehistoric world. It was being guided, being used as an impossible weapon. Its head and claws missed Matt by centimetres and he thought he had escaped. But as it went past, one of its wing tips brushed his face and he felt a searing pain as the bone cut into him. He gasped and put a hand to his cheek. There was blood on his palm. The pterodactyl performed an aerial somersault and soared back the way it had come. There had been no noise, no warning. Nothing. The museum was utterly silent.
    “Matt…” Richard began. There was panic in his eyes.
    “I’m OK,” Matt said, his hand still pressed against his cheek.
    “You’ve been cut.”
    “I don’t think it’s deep.”
    Richard craned his neck, staring up at the ceiling. “We’ve got to go.”
    Matt grimaced. “I wasn’t thinking of staying.”
    He had barely spoken the words before the pterodactyl was back. This time Richard was the target. The outstretched wing slashed through the air. It was as sharp as a sword. Richard cursed.
    “Richard…” For a dreadful moment Matt thought he’d been hit.
    “It’s OK. It missed me. It’s gone.”
    “Yes. But what about the others?”
    “What…?”
    Professor Dravid had called it the most remarkable exhibition of dinosaur fossils ever seen in London. The pterodactyl was only one of them. There