As the man and his dog passed the entrance to the zoo, they paused for a moment, and then turned and looked at it again. The low, wooden gate, which should have been secured at this time of night, was standing open. The dog whimpered, and snuffled around on the ground, which seemed to have been scuffed and churned up a little. The man hobbled up to the open gate and peered into the darkness beyond. Among the low huddle of buildings, all was darkness, except for a single dim light that glowed from the hut where Roy Harrison, Desmond’s keeper from Chatsfield, was staying. Nothing untoward. No sign of movement. So why was the gate open? It probably meant nothing. Most things, the man would have told you if you had asked him, probably meant nothing. Nevertheless, he summoned his dog with a gruff syllable and limped crossly through the gate, closing it behind them. Slowly, grindingly, they made their way along the gravel path to the single source of light: Roy Harrison’s temporary abode.

The place seemed quiet.

The man rapped sharply on the door and listened. No answer. He knocked again. Still, nothing. He opened the door. It wasn’t locked, but then, there was probably no reason for it to be. As he pushed his way into the tiny, dark hallway, his nose twitched at an odd smell. Zookeepers’ lodgings were exactly where you would expect to find a vast and rich range of odd smells, but not necessarily this particular sweet, cloying one. Hmmph. The dog let out a very, very slight little yelp.

On the right side of the hallway was a door, the source of both the light that could be seen from outside and the fragrance that could be smelt within. Still, all was quiet. Carefully the man pushed the door open.

At first glance he thought that the figure slumped over the kitchen table might be dead, but after a long, drawn-out moment of silence it emitted a light, riffling snore.

The dog whimpered again, and sniffed around the floor nervously. The dog always seemed oddly nervous for its size, and kept on glancing round to its master for reassurance. In fact it was altogether an odd dog, of uncertain breed, or breeds. It was large and black, but its hair was tufty, its body scrawny and clumsy, and its manner edgy, anxious, verging on the completely neurotic. Whenever it came to a halt for a moment or so, the business of starting up again often seemed to cause it trouble, as if it had difficulty in remembering where it had left each of its legs. It looked as if something very nasty had happened to it, or was about to.