if there were houses and a dock , there had to bea drive an open passage up to the road or roadsleading into bonn and the surrounding towns.leifhelm 's men were combing every inch of theriverbank , cautiously , quietly , the searchlights angleddown so as not to alarm the inhabitants or forewarnthe fugitive if he had reached the cluster of cottagesand was on his way up to the unseen road or roads.a ship 's radio would be activated , its frequencyaligned to those in cars roaming above , ready tospring the trap .