Hidden Clue

From: Carlos Light
Description: If the City wants us to help the Wanderer find the dangerous artifact, it’s our duty to do our best. The map Lucas found has led us to a nook in the street. There must be another clue hidden somewhere. Let’s look for it!
Completed: How did you see this secret plaque? They were used by the Defenders as secret signposts to place their troops. This plaque has a number on it, but what does it mean? Maybe a house or a street number? We need to find other clues.