he does that to show more expression in his stories. it is what all or most writers do to grab the readers attention. a writer doesn't want their readers to fall asleep and then get a bad review. if Edgar gets more and more anxiety in his story it will keep you wondering.
hope this helps
Annotating is the closest technique in the process of close reading.
Annotating the process of writing detailed notes around said paragraph. It doesn't just mean to take notes, you could also be highlighting or underlining some terms. I can't clearly describe it because you can practically do anything here.
If you do a Google search for the definition of annotation, you get...
<em>"a</em><span><em> note of explanation or comment added to a text or diagram."</em></span>
Life is short laugh and be merry