Answer:
The following passage grants us insight into the misery of the character. This is verbally confirmed via the phrase "interior gloom." The character is experiencing raw emotions to the extent that he does not care for external stimuli, he is entirely focused on processing whatever it is that is ailing him. Authoress Emily maximizes the melancholy atmosphere by using the terms: "the room was filled with the damp, mild air of the cloudy evening", "the fire smoldered to ashes", "and so still." These connotations all point toward the depression of the muse. Its a heavily negative atmosphere.