'There's been gas in the can until quite recently – it smells too strong. And when I picked it up the cap was still closed. Now, if that can had been full of gas during the fire it would have exploded – but it hasn't.'
Byrne seemed to be arguing in circles. 'So he put it in the main tank,' I said exasperatedly.
'No,' said Byrne definitely. 'I've seen a lot of burnt-out trucks in the desert, but never one like this – not with all four tyres gone like that, not with so much fire damage up front.' He bent down to examine the petrol tank, and then crawled under.
When he emerged he stood up and tossed something in his hand. 'That was lying on the ground.' It was a small screw cap with a broken wire hanging from it. 'That's the drain cap for the gas tank. The wire which is supposed to stop it unscrewing has been cut. That makes it certain. Someone doused this truck with gas from the can, then decided it would be a good idea to have more. So he drained another four gallons from the tank – maybe eight – to do a really good job of arson. You don't get auto tyres burning all that easily. Then he tossed in a match and went away, and the guy who would do that wouldn't be rescuing Billson.'
'So where's Billson?'
'Don't know. Maybe we'll find his body around here some place.'
I remembered something. 'The man I put on Billson's track back in England seemed to think that someone else was also looking for him.' I frowned. 'And then Hesther Rauhier…' I pulled out my wallet and found the note she had enclosed with the air ticket. I scanned it and handed it to Byrne.
He read it through, then said, 'Know this guy, Kissack?"
'Never heard of him.'
'Neither have I.' He gave me back the note.
'Another thing,' I said. 'Billson might have had a lot of money with him. I think he smuggled it out of the UK.'
'What do you call a lot of money?'
'The thick end of?60,000.'
Byrne whistled. 'I'd call that a lot, too.' He swung around and rooted in the back of the Land-Rover where all that was left of two suitcases were the locks, hinges, metal frames and a pile of ashes. He said, 'Whether Billson's money was in here when the fire bust out we'll never know without a forensic laboratory, and those are a mite scarce around here. Was it common knowledge that Billson would be carrying so much loose dough?'
'I shouldn't think so,' I said. 'It's really only a guess on my part.'
'You don't have a monopoly on guesses,' said Byrne. 'And a lot of guys have been killed for less than that.'
As we walked away from the Land-Rover I said, 'Funny that the chap who did this should close the cap on that empty jerrican; especially as he was going to leave it.'
'Probably automatic,' said Byrne. 'I do it myself. Good habit to have.'
'I'd still like to know what Billson was doing here,' I said.
'He was looking for a wrecked airplane, like you said. And he'd have found it, too – it's about five miles further north of here. I was going to head there if we hadn't found this. Billson must have heard about it back in Tarn so he came for a look-see, the goddamned fool!'
'It couldn't be…' I began.
'Of course it couldn't be his father's plane,' said Byrne tiredly. 'It's a French military airplane that force-landed back when they were getting ready to blow an atom bomb up at Arak. They got the crew out by chopper, then went back to take out the engines and some of the instruments. Then they left the carcass to rot.'
He went to talk to Mokhtar, and I sat on a rock feeling depressed. Billson must have been the biggest damned fool in the history of the Sahara. He had probably read the Land-Rover's Owner's Manual and taken the manufacturer's fuel consumption claim as gospel, but it's one thing tooling along a motorway and another fighting your way through Koudia. I doubt if we'd been getting more than five miles to the imperial gallon since we left Assekrem and perhaps ten or twelve in Atakor. I don't think it's disrespectful to British Leyland to suggest that the Land-Rover was averaging about the same.
But Billson had probably measured straight lines on a map and set out on that basis. But that was water under the bridge or, more accurately, vapour through the carburettor. What we had now was an entirely different set of circumstances in which Billson's idiocy didn't figure because, if we found his body it would be because he had been murdered by a man, and the man was possibly called Kissack.
It was then that I made the discovery. Mokhtar or Byrne would probably have done it, but they didn't – I did, and it brought back some of my self-respect as a working member of this crazy expedition and made me feel something less of a hanger-on while others did the work.
I was looking down idly at the rock on which I sat when I noticed a small brown stain over which an ant was scurrying. For a moment I wondered how even an ant could live in Koudia, and then I noticed another and then another. There was quite a trail of them going backwards and forwards between a crack in the rock and the stain.
