Lieutenant Mori has placed anther machine gun at the front gate, concealed in the foliage, just in case some Americans happen to blunder up this road in a jeep. Somewhere out there in the dark, the barrel of that weapon is tracking this car as it jounces up the road. The men know every dip and rise in that road, and can tell where the vehicles are by listening for the scrape of their undercarriages against the hardpan, a signature pattern of metallic dots and dashes.