'There's the big creek ahead,' Gavin pointed to a swirling muddy channel amid the thick spike-grass. 'On second thoughts we won't wait at the mouth. If the Slime Beast should emerge on the opposite bank we won't be able to get within range. As it is, if we take up a position further .back I can leap across where it narrows if necessary.'

'Seems a good idea,' she replied. 'Let's get settled in somewhere. I shall be glad when this night's over.'

Professor Lowson smiled to himself as he arrived at the mouth of the big creek. The small hollow on the near bank afforded shelter and cover as well as an ample view of the mud-flats in front of him. Carefully he unpacked his roll of strong netting, folding it neatly into a small square with the iron hooks resting on the top. He tested its weight with his right hand. Heavy but manoeuvrable. He lit his pipe and settled down to wait.

THE tide flowed. Paused. Ebbed. Seldom did it reach beyond the line of zos on Shep White's except during spring tides and in gales.

It was high tonight, coming almost within fifty yards of the old blockhouse, and creeping relentlessly. Only once had it ever been inside the concrete building, fifteen years previously when two visiting fowlers had disregarded their tide tables and camped there. Both had been drowned.

The salt residue sparkled in the moonlight as the water receded. Somewhere wild geese gaggled. Yet the saltings were not deserted altogether. In front of the sea-wall crouching behind the trunk of a dead tree which had been washed ashore during the summer a man waited. There was nothing about him to invite the interest of a passer-by. He was of average build and clean-shaven, no different from any of the other sensation-seekers who preferred to conduct their vigil within the confines of the village, secure in the knowledge that the army would protect them from the perils of the night. Every so often he gazed affectionately at the expensive camera and flash equipment which hung from his neck. It had cost him an awful lot of money. With luck it could earn him a great deal more.

Something moved. He heard it rather than saw it. Way out to his left where the reed-beds began. Perhaps it was a coypu or an otter. Maybe even a seal venturing far inland.

It was cold and he was bored. He thought again of his camera. Magazines paid well for nature pictures. Not as well as the leading dailies would pay for some of the Slime Beast but what was to stop him trying for both.

He rose to his feet, and choosing each step with care in an attempt to avoid noisily slurping in the patches of mud he headed towards the reeds. He could still hear it. 'Somewhere on the banks of the narrow channel it was wallowing in the sticky ooze. It probably was a coypu. He adjusted his flash attachment and entered the tall reeds. It was darker in here. More shadows. Difficult to see clearly. Blast! That was twice he had squelched in a patch of mire. Surely his quarry must be aware of his approach by now.

Silence. Perhaps it had gone, drifted to safety with the currents. He could see moonlight reflecting on water through the edge of this reed jungle. Another couple of yards and he would be in the open. His finger rested on the button of his camera. He would have to be quick.

He stepped into the open, but saw nothing, just moonlight, mud and a slow-moving current. The banks were empty, totally devoid of life. He gazed down at them in disappointment. Suddenly he noticed something. He stooped down for a closer look; footprints. Or was it the impression in the mud of some creature, possibly a coypu, which had hopped from one place to another leaving the indentations of its body to mark its progress. The prints were certainly large enough: a good twelve inches long by five across, yet they resembled claw marks, webbed claws, pointing in the direction from where he had come. A stagnant smell hung in the night air.

Realisation dawned upon him, but too late. There was a rustling and parting of rushes, a grunting and rasping of laboured breath, and a choking, foul odour. Slime covered scales, gaping jaws, fish-like eyes...

The man screamed. He might have run had not his feet sunk above the ankles into the sucking mud. Too late. His finger caught the button of his camera as the first slashing blow tore the flesh from his collar-bone.

A blinding eyeball-searing flash. The man felt the pain in his shoulder, and warmth of the blood welling up inside his tattered shut. He closed his eyes tightly hoping the next blow would be swift and painless. A quick end to it all.

He opened his eyes again. Something was wrong. He was still alive. The beast was nowhere to be seen. Only its odour remained, wafting on the breeze until it was replaced by the sweet-sour aroma of seaweed.

Eventually his ears picked up a faint sound. Distant footsteps squelching and splashing across the salt-marshes, hurrying in fact, going towards the sea-wall. Perhaps the Slime Beast was not going to Sutton after all tonight. Or maybe it was just making a detour. The man forgot all about his camera lying there in the mud.

Tom Southgate would have been quite happy to have kept the bar of The Bull open until the morning. Nobody showed any inclination to retire to the rooms which they had booked for the night. Indeed he would have continued pulling pints until the first faint light appeared in the eastern sky had not the law poked its head round the door shortly after eleven o'clock.

"Ere, 'ere,' PC Thorpe tried to appear stern although his instincts told him to go home, change and then return to the flowing ale. 'This ain't New Year's Eve y'know Tom!'

'OK, OK,' Southgate began draping tea-towels over the bar-taps. 'Just closing anyway Joe.'

However it was twenty minutes before the bar was empty. Even those who had taken rooms upstairs did not mount the narrow wooden steps to the floor above. Instead they flocked out on to Main Street, Everybody in Sutton was on Main Street. One or two of the householders were selling tea and coffee from open windows. People laughed and joked. There was no hint of terror. Only curiosity. After all, the army would protect them!

"Aren't you coming to bed?' Marjorie Southgate wiped the last of the glasses and turned to her husband who had been looking out of the window for the last ten minutes.

'Wouldn't sleep if I did,' he replied without turning his head. 'Nobody'll sleep in Sutton tonight There ain't a soul who'd miss seein' this Slime Beast cop one of the big shells.'

"It probably won't turn up after all. Can't say I blame it with all that lot out there. It'd hear 'em a mile off. Well I'm going to bed. You can please yourself Tom Southgate whether you come or not!'

He grunted. His thoughts returned to the scene outside. Maybe those half-dozen boys in khaki would appreciate a crate of beer. Trouble was they wouldn't want to pay for it, so there was no point in taking them one.

He opened the door and stepped outside. It was warm, almost like summer, and too nice to stay indoors. He headed across the street to where the soldiers were grouped around the small tank. He noted that someone had already supplied them with beer.

'Could do with a job like this every week,' a corporal was telling some young girls who were hanging around. 'Gives a chap time to appreciate life. No fear of getting a sniper's bullet in the back every minute of the day. For me, this here beast can take its time. Keep showin' up just enough to keep the top-brass happy. After all we don't want to kill it too soon do we ?'

Peals of laughter. Southgate smiled. The Slime Beast was certainly doing everybody a big favour.

The slight breeze was blowing off the land. It made a pleasant change. Gave a man a whiff of the farms, of newly harvested potatoes and barley stubble.