He followed them past Ashland until they came to some elevated rail tracks that had been dynamited and sealed. They turned south away from the demarcation line; the street sign read Ravenswood. Then, he noticed that the two men grew cautious. Though trying to appear natural as they carefully moved through the mass of people camped there, they continually changed their positions relative to each other, casually circling each other as if in animated conversation. All the while they scanned the area.