I have been one acquainted with the night.
I have walked out in rain—and back in rain.
I have outwalked the furthest city light.
I have looked down the saddest city lane.
I have passed by the watchman on his beat
And dropped my eyes, unwilling to explain.
I have stood still and stopped the sound of feet
When far away an interrupted cry
Came over houses from another street

But not to call me back or say good-bye;
And further still at an unearthly height
One luminary clock against the sky
Proclaimed the time was neither wrong nor right.
Even though there was a cry heard some distance away, indicating the presence of people near the narrator, the cry is not for the narrator as it does not “call [him] back or say good-bye.” In addition, although the people are nearby, the narrator is alone. Again, the distance between the cry and narrator represents the distance the narrator feels between himself and others. This reinforces the theme that the narrator is feeling lonely and as if there is no one there for him. 
 This line suggests the danger and isolation of the city. The cry could be an indication of somebody being attacked or hurt but nobody does anything about it. This has to do with the idea that many people ironically feel lonelier in a city, even though they are surrounded by people. 
 It’s also possibly a reference to the  diffusion of responsibility   that often occurs occurs in cities and which creates a reluctance for people to help others and interact with people around them.
Acquainted with the Night