galvanized sheet. Through it he heard the murmur of men's voices, too indistinct to understand the words. He checked the revolver in his belt, making certain the butt was at hand for a quick draw, and he eased himself along the back wall of the shed towards the small green wooden door.
Before he reached it, the door swung open and two men stepped out into the sunlight.
Ben Afrika was good with his hands and prided himself on the quality of his workmanship. He knelt on the pilot's seat of the Cessna Centurion aircraft and tightened the final bolts that held the twin cylinders to the deck in front of the right-hand passenger-seat.
He had drilled the bolt-holes with care so as not to damage any of the control cables which ran under the floorboards. Of course, he could have let the cylinders lie loose on the cabin floor, but that would have offended his engineering sense. There was always a danger of air turbulence in flight that might damage the valve or the tubing. He had positioned the steel bottles so that, while in flight, either the pilot or his passenger could reach the valve-handle readily.
The bottle that contained element A was painted in a black-and-white chequered pattern with three red rings around the middle. Element B was in a crimson bottle with a single black ring. Each bottle was stamped with its unique serial number.
It had taken all Ben's skill to forge two ordinary medical oxygen-bottles to exactly the same exterior appearance. He had engraved the serial numbers by hand. The bottles were small enough to be smuggled in and out of the Capricorn plant in pockets specially sewn into his overcoat. It had called for ingenuity and immaculate timing to get them through the security check at the main gate of the plant.
The bottles were joined by a stainless-steel T-piece that screwed into the special left-hand thread in the necks. Ben had turned the fittings on' the small secondhand lathe in the rear of the hangar. To operate them, first the taps on each bottle were screwed open, and after that a half-turn on the swinging valve-handle of the T-piece allowed the twin elements to mingle and become active. From there the 5eo nerve gas flowed under pressure into the flexible armoured hose. The hose led back between the front seats into the rear luggage-compartment.
Ben had drilled a three- centimetre hole clean through both the floorboards of the compartment and the outer metal skin of the Centurion. The end of the gas-hose passed out of this hole and protruded ten centimetres below the fuselage. He had fixed the hose in place, and sealed the narrow gap where it passed through the fuselage with Pratleys putty that dried as hard as iron.
The gas would spray from below the aircraft well behind the line of the front seats, and would be carried back in the slipstream without any danger of reaching the occupants of the Centurion. However, as an added protection they would wear safety-suits and breathe bottled oxygen during the release of the gas.
The suits hung on the hangar wall, ready to be donned in minutes. They were commercially marketed full-length protection-suits approved by the Fire Department for use by proto rescue teams in the gold mines.
For a second time Ben put a spanner on each of the hose connections and the joints of the T-piece to satisfy himself that there were no leaks. At last he grunted with satisfaction and backed out of the open cabin-door. He wiped his hands on a piece of cotton waste and went across to the workbench against the nearest wall.
The other two men were leaning over the bench studying the map. Ben came up behind Michael Courtney and draped his arm affectionately over his brother's shoulders.
'All set, Mickey,' he said in his incongruous south London accent.
Then he gave his full attention to Ramsey Machado. Ben hero-worshipped this man. When he was alone with Michael he often discussed him with the awe of an acolyte discussing the omnipotence of the Pope. Michael, on the other hand, realized the hideous nature of their mission, and it had taken many months of soul-searching for him to convince himself that this was something that had to be done if the struggle was to succeed.
Ramsey seemed to sense his lingering reluctance and turned to him now.
'Michael, I want you to ring Met and get a final weather forecast for this evening.' Michael picked up the telephone from the bench in front of him and dialled the number of the weather information services at Jan Smuts Airport and listened to the prerecorded announcement.
'Wind is Still 29o degrees at five knots,' he repeated. 'No change since this morning. Weather is settled. Barometric pressure steady.' 'Very well.' Ramsey picked up his red marker-pencil and circled the position of the showgrounds on the large-scale aeronautical map. Then he marked in the wind direction.
'OK. This will be your line of approach, about a mile up-wind of the target. Try to maintain a thousand feet above ground-level. Open the gas-valve as you pass the water-towers. They are very prominently lit with navigational warning lights.' 'Yes,' Michael said. 'I flew over the area yesterday. The stadium will be floodlit, and there will be a laser show - I can't possibly miss it.' 'Well done, Comrade.' Ramsey gave him one of his rare irresistible smiles.
'Your preparations have been excellent.' Michael looked down, and Ben interjected: 'I heard on the one o'clock news that by noon more than two hundred thousand visitors had already passed through the show ground turnstiles. It will be more like half a million by the time Vorster starts his official opening speech. What a blow we'll strike for freedom today.' 'Vorster's speech is scheduled to start at seven p. m.' Ramsey picked up one of the advertizing brochures issued by the show committee. He studied the opening programme. 'But it might be a few minutes late. We must allow for that. He will probably talk for between forty minutes and an hour. The military tattoo begins at eight p. m. When will you take off?' 'If we take off from here at hours,' Michael worked it out, 'it's4bout forty-eight minutes' flying. I timed it yesterday. That will get me over the target at thirty-three minutes past seven.' 'That would be about right,' Ramsey agreed. 'Vorster should still be speaking. You will make two passes across the range. A thousand feet above ground-level, one mile up-wind. After the second pass you turn west and head directly for the Botswana border. What is your estimated flying time to the rendezvous with Raleigh Tabaka?' 'Three hours fifteen minutes,' Michael replied. 'That gets me there approximately eleven o'clock tonight. By that time any residual gas will have degraded.' 'Raleigh Tabaka will light the airstrip with flares. As soon as you land remove all the gas equipment and set fire to the plane. From there it's up to Raleigh to get you out to Zambia and Tercio base.' Ramsey studied their faces. 'That's it, then. I know that we've gone over it a dozen times, but are there any questions?' The brothers shook their heads, and Ramsey smiled wryly. Despite the difference in the colour of their skins and the texture of their hair, there was a strong resemblance.
The revolution could never go forward without this kind of obedience and unquestioning faith, Ramsey thought, and he felt an unaccustomed envy of such uncomplicated trust. Let them believe that this single act would change the world and herald the perfect dawn of universal socialism and brotherly love. Ramsey knew that nothing was so simple.
He envied them their faith, but he wondered if they truly had the stomach to live through the stark reality of the slaughter of half a million lambs, and the Red Terror which must follow the successful onslaught of the revol ution. Sublime belief in the ultimate rightness of their action might permit them to turn the valve on a pair of innocent-looking steel bottles, but could they endure the reality of half a million corpses twisted and contorted in piles of hideous death? he wondered.
Only the steel men survived. These two were not of that temper. The Red Terror would claim them as it did all weaklings. After tonight their usefulness would be reduced. They would be expendable.
He touched Michael's shoulder gently. He knew that Michael liked to be touched by another man. He let the touch become a caress.
'You have done wonderfully well. Now you must eat and rest. I will leave you before you take off this evening. I salute you both.' They walked in a group to the door in the rear of the shed, but before they reached it Michael stopped.
'I want to look at Ben's installation of the bottles, and go over my own checks,' he said diffidently. 'I want to be absolutely certain.' 'You are right to want everything perfect, Comrade,' Ramsey agreed. 'We'll have something for you to eat when you come up to the house.' They watched him climb into the cockpit of the Centurion, and begin checking the instruments before they walked together to the door.
Ramsey threw open the small back door in the rear wall of the hangar, and as he and Ben stepped through into the sunlight together Sean Courtney was crouched against the side-wall on their left-hand side, staring at them.
Only six feet separated Ramsey and Sean, and their mutual recognition was instantaneous. Sean reached under his coat and plucked out the big magnum revolver. The double-action pull on the trigger delayed the shot a fleeting part of a second, and Ramsey seized Ben Afrika's arm and pulled him forward between them. With a muzzle-flash that was bright even in the sunlight, Sean's shot crashed into Ben's body.
The hollow-point bullet struck him on the tip of the left elbow and mushroomed instantly. It ploughed through his arm and into his flank. The entry-wound into his body was the size of an egg-cup. The bullet struck his last rib and began to break up. Fragments were deflected into his lung; others tore through his entrails. A splinter of the copper jacket cut between the vertebrae of the spine and halfsevered his spinal cord.
Ben was flung sideways by the impact and he
