The first of the two leading pursuit cars was within three hundred yards of the bus when it ran into the area of broken glass. From Schaffer's point of view it was impossible to tell what exactly happened, but such indications as could be gathered by long-range sight and sound were satisfying enough. The headlights of the leading car suddenly began to slew violently from side to side, the screeching of brakes was clearly audible above the sound of the post-bus's diesel, but not nearly as loud as the rending crash of metal as the second car smashed into the rear of the first. For a few seconds both cars seemed locked together, then they skidded wildly out of control, coming to rest with the nose of the first car in the right hand ditch, the tail of the second in the left hand ditch. The headlamps of both cars had failed just after the moment of impact but there was more than sufficient illumination from the lamps of the first of the tracks coming up behind them to show that the road was completely blocked.
'Neat,' Schaffer said admiringly. 'Very neat, Schaffer.' He called to Smith: That'll hold them, boss.'
Heidi walked forward, shivering in the icy gale blowing through both the shattered front and side windows. 'Yes, Major?'
'How far to the turn off?'
'A mile.'
'And to the wooden bridge -- what do you call it, Zur Alten Briicke?'
'Another mile.'
"Three minutes. At the most, that.' He raised his voice. Three minutes, Lieutenant. Can you do it?'
'I can do it.' Schaffer was already lashing together packages of plastic explosives. He used transparent adhesive tape, leaving long streamers dangling from the bound packages. He had just secured the last package in position when he lurched heavily as the post-bus, now clear of the Blau See and running through a pine forest, swung abruptly to the left on to a side road.
'Sorry,' Smith called. 'Almost missed that one. Less than a mile, Lieutenant.'
'No panic;,' Schaffer said cheerfully. He fished out a knife to start cutting the fuses to their 'shortest possible length, then went very still indeed as he glanced through where the rear windows had once been. In the middle distance were the vertically wavering beams of powerful headlights, closing rapidly. The cheerfulness left Schaffer's voice. 'Well, maybe there is a little bit panic, at that. I've got bad news, boss.'
'Next corner.'
While Schaffer worked quickly on the fuses, Smith concentrated on getting the post-bus round the next corner as quickly as possible without leaving the road. And then they were on and round the corner and the bridge was no more than a hundred yards away.
It was not, Smith thought, a bridge he would have chosen to have crossed with a bicycle, much less a six ton bus. Had it been a bridge crossing some gently meandering stream, then, yes, possibly: but not a bridge such as this one was, a fifty-foot bridge surfaced with untied railway sleepers, spanning a ravine two hundred feet in depth and supported by trestles, very ancient wooden trestles which, from what little he could see of them from his acute angle of approach, he wouldn't have trusted to support the tables at the vicar's garden party.
Smith hit this elderly and decrepit edifice at forty miles per hour. A more cautious and understandable approach might have been to crawl over it at less than walking pace but Smith's conviction that the less time he spent on each ancient sleeper the better was as instantaneous as it was complete. The heavy snow chains on each tyre bit into and dislodged each successive sleeper with a terrifying rumble, the post-bus bounced up and down as if on a giant cake-walk while the entire structure of the bridge swayed from side to side like the bridge of a destroyer at speed in a heavy cross-sea. It had been Smith's original intention to stop in the middle of the bridge but once embarked upon the crossing he would no more have done so than dallied to pick up an edelweiss in the path of an Alpine avalanche. Ten feet from the edge of the bridge he stamped on the brakes and skidded to a sliding halt, on solid ground again, in less than twenty yards.
Schaffer had already the back door open and the two packages of plastic explosives in his hands before the bus stopped. Five seconds after hitting the road he was back on the bridge again, skipping nimbly over a dozen dislodged sleepers until he had arrived at the main supports of the central trestle. It took him less than twenty seconds to tape one package to the right hand support, cross the bridge and tape the second package to the left hand support. He heard the deepening roar of a rapidly approaching engine, glanced up, saw the swathe of unseen headlamp beams shining round the corner they had just passed, tore off the ignition fuse, crossed the bridge, tore off the other and raced for the bus. Smith had already the bus in gear and was moving away when Schaffer flung himself through the back doorway and was hauled inside by helping hands.