His gaze was drawn automatically towards the end stone building, the one where Gwyther's bull lived. The door hung wide, a T-hinge broken so that it dragged on the ground. He could see inside; it was empty, no sign of the bull!

Another twinge of unease. Well, the bull had to be grazed sometimes, left to run with the cows. Probably that was where it was now, in one of the lower meadow fields down by the river.

Slowly Jon Quinn slid out of the Land Rover, grasped the gun in his right hand, stood looking about him. The place always looked this way, it had never been any different. Old Bill spent 365 days a year working in the fields the hard way because he didn't know anything else. Out at first light and back in at dusk. Oil-lamps instead of electric lights. But he did have a telephone! It had caused a stir amongst the other hill-farmers when word got around that a Telecom van had been seen there, two men running out a cable from the Elbow. Old Bill surely wouldn't be having the phone put in because even if he did he wouldn't know how to use it. Bill Gwyther didn't, he only took incoming calls in his own inimitable way and his quarterly bill was never more than the cost of the rental. Another unsolved mystery, but you didn't ask because his answer wouldn't enlighten you any.

Jon sized up the house. The door and window frames probably hadn't seen a coat of paint since before the war. Most of the frames were rotten but they would only be replaced when they fell out, A couple of panes were cracked, maybe deliberately left uncleaned so that nobody could see in. You were never asked in the house whatever your business.

He walked slowly towards the front door. Usually the dog barked a warning but not today. Total silence except for the distant bleating of sheep and a buzzard mewing somewhere up on the Hill.

He reached the door, paused; a schoolboy about to tap on the door of the headmaster's study. I'm awfully sorry to trouble you, sir, but. . . Swallowing, nervous. What is it, boy? What brings you round here?

It's your dog, Mr Gwyther. He's killed one of my calves, turned feral.

Not my dog, boy. He's been chained up here all the time, hasn't been loose. Somebody else's dog. The door dragged shut, end of conversation.

Anger gripped Jon Quinn. No bloody fear, Gwyther wasn't getting out of this just because he thought he owned the Hill. It was his dog and he'd have to pay. The dog would have to be put down. If necessary he would call the . . . no, there wouldn't be any police now and even if there were they would have more important things to do than to chase after killer dogs. He'd bloody well shoot it himself!

He rapped the woodwork, winced at the pain in his knuckles. The door looked as though it was rotten like everything else around here but in fact it was solid oak. He stood back and waited.

A couple of minutes and he was convinced that there was nobody here, not in the house anyway. Logically that wasn't surprising because Gwyther worked all the daylight hours. He had to be around the buildings somewhere, or else out in the fields. Jon Quinn would find him wherever he was.

He checked the outbuildings. A long cattle-shed that hadn't been mucked out for a year or two, fresh straw constantly spread on the oid in a continual deep-litter system. Flies swarmed, huge bluebottles bloated with the filth they had eaten. They settled again, continued feeding.

An implement shed that would have been an exhibit in a farm museum, an array of horse-brasses hanging from nails knocked in a rafter. The floor was a carpet of rat droppings.

But no sign of Bill Gwyther. Jon stood there in the yard wondering what to do. Should he go and search the fields? Or should he go back home and come again later? Both would, in all probability, be a waste of time, and he did not want to leave Sylvia alone longer than was absolutely necessary. Neither did he want to have to come back here again. The only time he was likely to find Gwyther at home would be after dark. After dark! His spine tingled at the thought. No way; once dusk came he was going to lock himself in his own cottage with Sylvia and . . .

A footfall, so soft that it was barely audible, some sixth sense warning him before his ears picked it up. He turned, stared; told himself that it could not be, that nothing like (hat could possibly exist. It was his imagination. But he had not imagined the goats and the hens; unbelievable as they had seemed, they were real. And so, therefore, was this . . . thing that stood only a few yards from him, frozen into immobility now that its furtive stalk had been discovered. It had been in the act of creeping upon him with a broken rusted pitchfork, its intention to plunge the sharp twin prongs into his back as he stood there unaware of its presence.

Jon Quinn's first thought was that the creature was some' kind of ape, a zoo specimen which had escaped and taken to the hills. It had happened with other animals in the past, not too far from here. The body was covered by sparse hair, sandy coloured but greying with age. No more than five feet in height, arms and legs ridiculously short in proportion to the rest of its body. The face was squat, lips pouted then drawing back to show a toothless mouth, close-set eyes narrowed into an expression of curiosity, turning to animosity. A balding head.

Recognition came slowly to Jon Quinn because even when he realised he still refused to believe. The blue eyes, the toothless mouth, the stance stamped with arrogance. In the end he was faced with the possibility that the thing standing before him might be none other than Bill Gwyther! A possibility that merged into a probability. Then a certainty.

Oh Merciful God! Then this is what has happened to the human race; reduced to this!

Gwyther, and it surely was him, was giving a series of low grunts, unintelligible animal noises that were obviously not intended to be friendly. Their interpretation was anybody's guess. 'What're you doin' here, boy?' Advancing another step, stopping again, the pitchfork lifted so that it rested at hip-level, its wicked points trained on Jon Quinn's stomach.

'Mr Gwyther?' Jon felt incredibly stupid, but somehow he had to say something. 'Mister' because he always called the old man 'Mister'. Everybody round here did, even the older generation of farmers. Just as Gwyther called them all 'boy'. A mark of respect in a way, underlining the generation gap because Gwyther had always been 'Old Gwyther' even in their fathers' days.

They stood looking at each other and in those few seconds a picture flashed across Jon's mind, one that he had seen only comparatively recently. His brain had absorbed the image, thrown it out now like a computer processing relevant data. An artist's impression framed on a local museum wall, captioned 'A Stone Age Man'. And with a feeling of uneasiness Jon Quinn reflected that that unknown artist had done his homework pretty thoroughly; the shape of the head in relation to the squat body and short arms and legs, tiny eyes, pouted mouth. Like one of those police identikit pictures.

And it had come up with Bill Gwyther! Jon Quinn took a deep breath, drew himself up to his full height, tensed every muscle in his body. There was no way they could communicate, no compromise. Modern Man faced primitive Man, enemies because it could not be any other way.

Jon knew exactly what the other had in mind, what he was going to do. No warning. Foe had met up with foe and one of them had to die. They both accepted the fact. Slowly he eased the gun up into the crook of his arm, pushed the safety catch forward with a faint click. He was not even trembling now that he had made his decision. There could be only one outcome and he must be the one who finally walked away; the victor.

Again that inexplicable sixth sense precipitated the action. He saw the wicked double prongs start to move, coming towards him spear-like, balanced for the final thrust. And in that instant he pushed the gun forward, found the triggers and fired a double blast from the hip.