Knox switched on his own lights, stamped down his foot, surged out of the sugar cane, the Toyota throwing up great sprays of water; startled faces in the truck, the driver wrenching his steering wheel, his passenger calling in back-up. He sped alongside the field until he spotted a track, swung down it, driving by feel, stalks drumming against his flanks.
Headlights in front, a car speeding past on a road, he spilled too fast out onto it, charging into the tilled field opposite before swinging around, accelerating away. He rounded a tight bend, saw two police cars blocking the lane ahead, slammed on his brakes, muddy tyres struggling for grip on the saturated surface. He put it into reverse, but another police car was coming up fast behind. He steered off the road, down a short embankment into a quagmire field, changed to four-wheel, gained traction, the pursuing police car bogging down behind. He reached an abandoned railway spur, turned left, jolting along the sleepers, checking his mirrors, hoping he'd got away. But then a pair of headlights appeared in his rear-view, shuddering over the tracks, and then a second pair. He looked left and right, but the track was bracketed by waterlogged ditches that even the Toyota would struggle to get out of.
A freight train clanked slowly into view ahead, a monster with dozens of carriages. He tried to beat it to the junction but it got there first: there was no way past it, wouldn't be for another couple of minutes at the rate it was going. The police were catching up fast, their sirens sounding, lights flashing. There was nothing for it. Knox stuffed his pockets with the phone, wallet, scissors, pen, anything of potential use, jumped out, ran to the train, grabbed hold of a ladder, climbed up onto the roof. The train had appeared from his left and therefore was heading south, maybe even as far as Assiut, where the search was on for Gaille. But Knox had no interest in Assiut any more. He'd figured out the mosaic, why Gaille had tried to bring his attention to it; and the solution beckoned him not south but east.
He found a ladder on the other side of the roof, climbed down, jumped from the moving train, winding himself on landing. The Nile was a good couple of kilometres away. He tore through a thicket, out into a field, his feet splashing up gouts of water as he ran, the secret of the mosaic ablaze in his mind.