At the same time he changed his disguise. He now looked as tough as any of the night prowlers in the questionable neighborhood.
Darwin entered a tall tenement.
Carter hurried out of his place of concealment.
He also went into the house and stood in the lower hall.
On each floor lights were burning.
As he looked up, he saw Darwin distinctly on the next floor, and he heard him knock on the door of the back room.
Darwin knocked a number of times, and no one opened the door.
When he started to descend the stairs, Carter walked out, and took up a position in a doorway of a house near the corner.
Darwin came out of the tenement, walked to the corner, and halted.
Back and forth he moved, and kept looking at the house.