His eyes were very close to the paper, but it was some time before the flame of the lighter, stronger now the windows had been wound up, permitted him to find the route they were taking. Every movement of the car jolted his finger from the lines he was tracing out for them. He was aware of the frustration building up inside the car as his colleagues waited for his information, but it was a network of country lanes and minor roads that they were asking him to ferret through. He took his time. Perhaps no opportunity to rectify a mistake: one alone would be disastrous. Let them wait till he was ready, and certain.

When at last he was satisfied he drew an envelope from an inner pocket of his anorak and began to write. He had trouble with the spelling of the villages, the printing was so miniature, and several times he was obliged to look again and work slowly through the longer words. He flicked the lighter closed.

'It will be the last time we can manage it for such a long time. The flame has little more power. We are well, I think.

We are on the road to Fauquembergues. First we must pass through Estrees, but it looks to be the same road. At Fauquembergues there are three roads that divide just above the village. We take the most northerly, the one to the right. After that, on to Liane and so to Samer. Boulogne must be signed there.'

'How far to Estrees?' said the driver.

'Two, three kilometres, perhaps. We go straight through. Then Fauquem… ' His voice tailed away as once again he sought to read his scribblings in the half light of the dashboard illumination.

'You're sure, now? No doubts about the route?'

'None at all,' the passenger snapped back.

He felt irritated. We hardly know each other, he thought, we've been together for days now but have no personal contact. Had never met before the planning of this mission. Had only talked in the most general and superficial way; that was as it was intended. Each one dependent on the other, needing to trust totally in the skill and resolution of his colleagues, but without the deep-rooted certainty that comes from long-standing knowledge and companionship.