What was a 'wall watcher' in the late 1800s and early 1900s?

• A. A supervisor who watched for wall cracks in a structure
• B. A tool used to monitor wall movement
• C. A safety device to reinforce walls
• D. Fire fighters who stood at the corners of buildings and watched the walls for signs of sagging or bowing during a working fire

Answer: (D)

Wall watchers were firefighters stationed at the corners of burning buildings to observe exterior walls for movement cues—signs like sagging, bowing, or cracking. In that era, structures could fail rapidly from heat and fire, and outside observation provided crucial early warning to interior crews, enabling timely retreat or a shift to defensive tactics. This role wasn't about supervising cracks, using a tool, or reinforcing walls; it was about observing and signaling when a wall showed instability so others could respond to prevent a collapse.