Why does Miller use the phrase almost imperceptible in the stage directions in passage 143?

The missionaries who appear in the novel are colonists from britain portugal spain italy

Read the movie summary. two rival magicians compete for fame and success in edwardian london. when their bitter feud begins to escalate, they each resort to more and more dangerous tricks to try to outdo the other, ultimately placing the lives and sanity of those around them in jeopardy. based on this summary, the film is most likely a(n) action thriller dramatic thriller psychological thriller science fiction thriller

What is the best statement about carl sandburg poetry?