He broke off and Riggs stared hard at the map, peaked cap pulled down over his eyes in a gesture of concentration.

"But why south?" Daley protested. "Once he leaves the channel there's nothing but solid jungle and open sea. The temperature is going up all the time-he'll _fry_."

Riggs looked up at Kerans. "Sergeant Daley has a point, Doctor. Why should Hardman choose to travel south?"

Looking out across the water again, Kerans replied in a flat voice: "Colonel, there isn't any other direction."

Riggs hesitated, then glanced at Macready, who had stepped back from the group and was standing beside Kerans, his tall stooped figure silhouetted like a gaunt crow against the water. Almost imperceptibly he nodded to Riggs, answering the unspoken question. Even Daley put a foot up on the cockpit entry step, accepting the logic of Kerans' argument and the shared understanding of Hardman's motives once Kerans had made them explicit.

Three minutes later the helicopter was speeding off at full manifold pressure towards the lagoons in the south.

As Kerans had prophesied, they found Hardman among the silt flats.

Descending to three hundred feet above the water, they began to rake up and down the distal five-mile length of the main channel. The huge banks of silt lifted above the surface like the backs of yellow sperm whales. Wherever the hydrodynamic contours of the channel gave the silt banks any degree of permanence, the surrounding jungle spilled from the rooftops and rooted itself in the damp loam, matting the whole morass into an immovable structure. From the hatchway Kerans scrutinised the narrow beaches under the outer edge of the fern trees, watching for the tell-tale signs of a camouflaged raft or make-shift hut.

After twenty minutes, however, and a dozen careful sweeps of the channel, Riggs turned from the hatchway with a rueful shake of his head.

"You're probably right, Robert, but it's a hopeless job. Hardman's no fool, if he wants to hide from us we'll never find him. Even if he were leaning out of a window and waving, ten to one we wouldn't see him."

Kerans murmured in reply, watching the surface below. Each of the tracking runs was about a hundred yards to the starboard of the previous one, and for the last three runs he had been watching the semi-circular crescent of what appeared to be a large apartment block standing in the angle between the channel and the southern bank of a small creek which ran off into the surrounding jungle. The upper eight or nine storeys of the block stood above the water, enclosing a iow mound of muddy-brown silt. The surface streamed with water draining away from a collection of shallow pools covering it. Two hours earlier the bank had been a sheet of wet mud, but by ten o'clock, as the helicopter flew over, the mud was beginning to dry and grow firm. To Kerans, shielding his eyes from the reflected sunlight, its smooth surface appeared to be scored by two faint parallel lines, about six feet apart, that led across to the jutting roof of an almost submerged balcony. As they swept overhead he tried to see under the concrete slab, but its mouth was choked with refuse and rotting logs.

He touched Riggs' arm and pointed to the tracks, so immersed in tracing their winding progress to the balcony that he almost failed to notice the equally distinct pattern of imprints emerging in the drying surface between the lines, spaced some four feet apart, unmistakably the footsteps of a tall powerful man hauling a heavy load.

As the noise of the helicopter's engine faded out on the roof above them, Riggs and Macready bent down and inspected the crude catamaran hidden behind a screen of bocage under the balcony. Fashioned from two drop tanks lashed to either end of a metal bed-frame, its twin grey hulls were still streaked with silt. Clumps of mud from Hardman's feet crossed the room opening onto the balcony and disappeared through the suite into the adjacent corridor.

"This is it without a doubt-agree, Sergeant?" Riggs asked, stepping out into the sunlight to look up at the crescent of apartment blocks. A chain of autonomous units, they were linked by short causeways between the elevator wells at the end of each building. Most of the windows were broken, the cream facing tiles covered by huge patches of fungus, and the whole complex looked like an over-ripe camembert cheese.

Macready knelt down by one of the hulls, cleaning away the silt, then traced out the code number painted across the bow. "UNAF 22-H-549-that's us, sir. The drop tanks were being cleared out yesterday, we'd stored them on C-Deck. He must have taken a spare bed from the sick-bay after ward-roll."

"Good." Rubbing his hands together with pleasure, Riggs stepped over to Kerans, smiling jauntily, his self-confidence and good humour fully restored. "Excellent, Robert. Superb diagnostic skill, you were quite right, of course." He peered shrewdly at Kerans, as if speculating on the real sources of this remarkable insight, invisibly marking him off. "Cheer up, Hardman will be grateful to you when we take him back."

Kerans stood on the edge of the balcony, the slope of caking silt below him. He looked up at the silent curve of windows, wondering which of the thousand or so rooms would be Hardman's hiding place. "I hope you're right. You've still got to catch him."

"Don't worry, we will." Riggs began to shout up at the two men on the roof, helping Daley lash down the helicopter. ' Wilson, keep a look-out from the south-west end; Caldwell, you work your way across to the north. Keep an eye on both sides, he might try to swim for it."

The two men saluted and moved off, their carbines held at their hips. Macready cradled a Thompson gun in the crook of his arm, and as Riggs unbuttoned the flap of his holster Kerans said quietly: "Colonel, we're not tracking down a wild dog."

Riggs waved this aside. "Relax, Robert, it's just that I don't want my leg bitten off by some sleeping croc. Though as a matter of interest-" here he flashed Kerans a gleaming smile "-Hardman has got a.45 Colt with him."

Leaving Kerans to digest this, he picked up the electric megaphone.

"HARDMAN!! THIS IS COLONEL RIGGS!!" He bellowed Hardman's name at the silent heat, then winked at Kerans and added: "DR. KERANS WANTS TO TALK TO YOU, LIEUTENANT!!"

Focussed by the crescent of buildings, the sounds echoed away across the swamps and creeks, booming distantly over the great empty mudflats. Around them everything glistened in the immense heat, and the men on the roof fretted nervously under their forage caps. A thick cloacal stench exuded from the silt flat, a corona of a million insects pulsing and humming hungrily above it, and a sudden spasm of nausea knotted Kerans' gullet, for a moment dizzying him. Pressing a wrist tightly to his forehead, he leaned back against a pillar, listening to the echoes reverberate around him. Four hundred yards away two white-faced clock towers protruded through the vegetation, like the temple spires of some lost jungle religion, and the sounds of his name-"_Kerans_… _Kerans_… _Kerans_"-reflected off them seemed to Kerans to toll with an intense premonition of terror and disaster, the meaningless orientation of the clock hands identifying him, more completely than anything he bad previously experienced, with all the confused and minatory spectres that cast their shadows more and more darkly through his mind, the myriad-handed mandala of cosmic time.

His name still echoed faintly in his ears as they began their search of the building. He took up his position at the stairwell at the centre of each corridor while ffiggs and Macready inspected the apartments, keeping a look-out as they climbed the floors. The building had been gutted. All the floorboards had rotted or been ripped out, and they moved slowly along the tiled inlays, stepping warily from one concrete tie-beam to another. Most of the plaster had slipped from the walls and lay in grey heaps along the skirting boards. Wherever sunlight filtered through, the bare lathes were intertwined with creeper and wire-moss, and the original fabric of the building seemed solely supported by the profusion of vegetation ramifying through every room and corridor.

Through the cracks in the floors rose the stench of the greasy water swirling through the windows below. Disturbed for the first time in many years, the bats which hung from the tilting picture rails flew frantically for the windows, dispersing with cries of pain in the brilliant sunlight. Lizards scuttered and darted through the floor cracks, or skated desperately around the dry baths in the bathrooms.

Exacerbated by the heat, Riggs' impatience mounted as they climbed the floors and had covered all but the top two without Success.

"Well, where is he?" Riggs rested against the stair-rail, gesturing for quiet, and listened to the silent building, breathing tightly through his teeth. 'We'll stand easy for five minutes, Sergeant. Now's the time for caution. He's somewhere around here."

Macready slung his Thompson over his shoulder and climbed to the fan light on the next landing which let in a thin breeze. Kerans leaned against the wall, the sweat pouring across his back and chest, temples thudding from the exertion of mounting the stairs. It was 11-30, and the temperature outside was well over 120 degrees. He looked down at Riggs' flushed pink face, admiring the Colonel's self-discipline and single-mindedness.

"Don't look so condescending, Robert. I know I'm sweating like a pig, but I haven't had as much rest as you lately."

The two men exchanged glances, each aware of the conflict of attitude towards Hardman, and Kerans, in an effort to resolve the rivalry between them, said quietly: "You'll probably catch him now, ColoneL"

Searching for somewhere to sit, be walked off down the corridor and pushed back the door into the first apartment.

As he unlatched the door the frame collapsed weakly into a litter of worm-eaten dust and timbers, and he stepped across it to the wide french windows over-looking the balcony. A little air funnelled through, and Kerans let it play over his face and chest, surveying the jungle below. The promontory on which the crescent of apartment houses stood had at one time been a small hill, and a number of the buildings visible beneath the vegetation on the other side of the silt flat were still above the flood-waters. Kerans stared at the two clock towers jutting up like white obelisks above the fern fronds. The yellow air of the noon high seemed to press down like a giant translucent counterpane on the leafy spread, a thousand motes of light spitting like diamonds whenever a bough moved and deflected the sun's rays. The obscured outline of a classical portico and colonnaded facade below the towers suggested that the buildings were once part of some small municipal centre. One of the clock-faces was without its hands; the other, by coincidence, had stopped at almost exactly the right time-11-35. Kerans wondered whether the clock was in fact working, tended by some mad recluse clinging to a last meaningless register of sanity, though if the mechanism were still operable Riggs might well perform that role. Several times, before they abandoned one of the drowned cities, he had wound the two-ton mechanism of some rusty cathedral clock and they had sailed off to a last carillon of chimes across the water. For nights afterwards, in his dreams, Kerans had seen Riggs dressed as William Tell, striding about in a huge Dalinian landscape, planting immense dripping sundials like daggers in the fused sand.