feet long and nearly a foot in diameter, shot into the open throat of the balloon. It took Stafford by surprise and he started, then looked towards Judy. She was laughing so he grinned back weakly.
The roar went on and on, and the balloon expanded like a blossoming flower caught in time-lapse photography. Hunt switched off the flame, and one of the Kenyans turned off the fan and there was blessed silence. Hunt looked up as the ballon rose above them. 'All hands to the basket,' he said, and sent another burst of flame into the balloon.
The two Kenyans joined Stafford and Judy as the basket began to stir like a live thing. Slowly it began to tilt upright as the flame poured heat into the envelope. Hunt switched off again, and shouted, 'Let go the crown rope.' Immediately the basket became upright as the balloon surged above them. 'All hands on,' said Hunt, and four pairs of black hands clamped on the padded edges. 'Max, get in.'
There was a sort of footstep in the wickerwork so Stafford put his foot in it and swung his other leg inboard. Hunt caught his arm and helped him regain balance. Judy climbed in from the other side. She immediately began to turn a valve on one of the cylinders of which there were four, one in each corner of the basket. Hunt was giving short blasts of flame, a few seconds at a time. It seemed to Stafford as though he was doing some kind of fine tuning. Once he said, 'Hands off,' and then, almost immediately, 'Hands on.'
Lucas was rolling a cylinder along the ground towards the basket. Judy unstrapped the cylinder she had been working on and exchanged it for the one brought by Lucas. Then she tapped her brother on the shoulder. 'Okay to go.'
He released a sustained flame, then said 'Hands off.' For a moment nothing apparently happened and then Stafford became aware that they were airborne. The ground was dropping away as they rose in complete silence, and the slight breeze he had felt on the ground had disappeared.
Hunt said, 'The wind is just right. We'll pass over Jim's vegetable patch, take our pictures, and we're set for Hell's Gate. But we'll get some height for the photographs.' The burner roared and Stafford felt heat on his face as he looked up into the vast, empty interior of the envelope into which the flame was disappearing. When he looked down again the ground was receding even faster and the landscape was opening out.
Hunt pointed. 'The College. We'll pass over it. You ready, Judy?'
She bent down to look through a viewfinder. 'Everything okay.'
Stafford produced his own camera. It was a Pentax 110; not a 'spy' camera like the Minox, but still small enough to be carried unobtrusively in a pocket. It also came with a selection of good lenses.
The noise of the burner stopped. 'We'll still rise a bit,' said Hunt conversationally. 'What do you think of it?'
To Stafford's surprise all his qualms had gone. 'I think it's bloody marvellous,' he said. 'So peaceful. Except for the noise of the burner, but that isn't on all the time.'
'There's Dirk Hendriks down there,' said Hunt. 'Talking to Brice outside the Admin Block.' He waved. 'If we were lower we could have a chat.'
'How high are we?'
'Getting on for 2,000 feet from point of departure. That's about 8,000 feet above sea level. The experimental plots are coming up, Judy.'
'I see them.' She took about ten photographs while Stafford took some of his own and then straightened. 'That's it,' she said. 'The work's done. Now for the pleasurable bit.'
'About the noise of the burner,' said Hunt. 'It's difficult to make a quiet burner; I'd say impossible. This one up here is rated at ten million Btu – that's about 4,000 horsepower. You can't keep that lot quiet when it's ripping loose.'
'You're kidding,' Stafford said unbelievingly.
'No, it's quite true. One of the gas cylinders will provide the average household with two months' cooking – we use it up in less than half an hour. But we're not operating at maximum efficiency, so I reckon we're getting about 3,000 horsepower. In England and America they use propane but that's a bit tricky in the African heat so we use butane which has a lesser calorific value. And we have to add pressure with nitrogen; that's what that little cylinder there is for.'
Stafford found the power of the burner hard to believe. Hunt said, 'This dial tells the temperature – not here, but at the crown of the balloon up there.' He jerked his thumb upwards. 'Optimum temperature is 100 degrees Celsius.'
'But that's the boiling point of water.'
'Quite so,' Hunt said equably. 'If it gets above 110 degrees I'm in trouble – the nylon doesn't like it – so I keep a careful eye on the bloody gauge.'
'We're coming up to the entrance of Hell's Gate,' said Judy. 'Alan, come low over Fischer's Column.'
'Okay, but I'll have to go up after that.' He produced a packet of cigarettes and offered one. As Stafford looked doubtfully at the cylinders of butane surrounding them Hunt smiled, and said, 'Quite safe; it'll just add a bit more hot air.'
They drifted into the gorge of Hell's Gate through a gap in sheer cliffs. Hunt occasionally reached up to the burner controls and gave a short blast. Apart from that it was quiet and Stafford could hear cicadas chirping and the twittering of birds. The smoke from his cigarette ascended lazily in a spiral and he realized that was because they were moving at; the same speed as the wind. It was weird.
'There's Lucas in the chase car,' said Judy. He looked down and saw the Land-Rover bucketing along a track on the floor of the gorge and towing a trailer. 'That's one of the problems of ballooning; you have to have a way of getting back to where you started.'
Stafford looked up at the immensity of the envelope above, and then down again at the Land-Rover. It seemed strange that a structure the size of a six-storey office block could be folded up to fit in a small trailer. Ahead, rising from the floor of the gorge, was a big rock pillar, tapering to a needle point. 'Fischer's Column,' said Judy. She opened the lid of a box which was lashed to the side of the basket and took out a pair of binoculars. 'We should see rock hyrax. Believe it or not, they're the nearest relation to the elephant. Cuddly creatures.'
'Not too cuddly,' remarked Hunt. 'They carry rabies.'
They were now quite close to the ground, not more than fifty feet high, and Hunt was maintaining this height by short bursts of flame. For a moment Stafford thought they were going to crash into the rock column but they passed about twenty feet to one side. 'There,' said Judy. 'Those are hyrax.'
They were small animals which he would have taken to be rodents. A couple of dozen of them took fright and dashed for crevices in the rocks and disappeared. As they passed Hunt said, 'That's the closest I've been to Old Man Fischer. It's an old volcanic plug, you know.' He operated the burner control and the flame roared in a sustained burst. 'Up we go. There'll be bigger game ahead.'
The balloon rose and the strange landscape of Hell's Gate spread before them. The cliffs to the east were alive with birds which flew faster than any others Stafford had seen. Judy said they were Nyanza swifts. Ahead there was another, but smaller, rock column which he was told was called Embarta. As they rose above the cliffs the crater of the volcano Longonot came into view in the east and Hunt turned off the flame.
Stafford said, 'What kind of bigger game?'
'Oh, eland, zebra, impala – the usual inhabitants. Giraffe, perhaps.'
He saw them all. The zebra herds wheeled as the balloon shadow passed, and the giraffes galloped off in a rocking-horse canter. But none of the animals moved far away; as soon as the balloon drifted by they resumed their grazing and browsing placidly. Stafford said, 'Is this a game reserve?'
'Oh, no,' said Hunt. 'But there is plenty of game outside the reserves.' They were drifting lower and he had the binoculars to his eyes. 'Look there,' he said, handing them to Stafford. 'That tree by the big rock there. There's a leopard on the branch to the right. I wonder if he's the chap who's been visiting the College.' The leopard looked up incuriously, and yawned as the balloon went silently by.
'There's a lammergeier,' said Judy. There was an odd note of warning in her voice. Stafford looked to where she was pointing and saw a big bird circling.
Hunt said, 'That means our flight is nearly over. When the lammergeier goes up the balloon comes down.'
'Why?' asked Stafford. 'Is it likely to attack us?' He could imagine that a sharp beak and talons could make a few nasty rents in the thin fabric of the envelope.
Both Hunt and his sister went into fits of laughter. 'No,' Hunt said. 'A lammergeier wouldn't attack anything. He's a carrion eater. But when he's in the air it means that the ground has heated up enough to start thermals
