Answer:
Well maybe if I actually read this story it would make more sense. I feel I need a little bit more text. But from here it seems that he seems guilty that his friend is standing in front of his face. Somewhere around there..
Explanation:
Sorry if it didn't help a lot I would prefer more context.. Have a wonderful day! :))
The underlined phrase <em>in the pool </em>modifies, or refers to the word A. chlorine.
What is in the pool water? The chlorine.
But what is required is what question
Bierce uses the images of a watch, the rising and setting sun, and the swiftly or sluggishly flowing stream during the escape.