In silence he listened to his own heart ruffle away, away, at last gone from his ears and back in his chest again. What effect does this mood have on the reader?

The mood of the poem has an effect that is one of melancholy and parting.

Explanation:

The use of the line in the way in which the going away of the heart in a ruffling is accentuated in the phrase heart ruffle away, away , it is evident that the poet is going for a melancholic mood that delves into the pain of separation with oneself.

The poem finds the person in isolation and noticing the signs of the heart returning to his own chest in the grim peace that he finds in his somber state of ruffling away from passion to poise in the silence of inaction.

sensory details?

so i`m assuming you are writing something from a bats (the animal) point of view. if this is the case, you can use sights, sounds, feelings, and tastes.

and idk what you mean by domain, but all of the sensory details will depend on where the bat is.

a bat doesn't see color very well, so its surroundings will be dulled.

it can hear super well. so maybe it can hear the insects on the ground

feelings. you can imagine how a bat would feel from its perspective. it all depends on where it lives.

maybe it can taste the salt in the air, or smell water, or something. all of these details are completely dependent on where it is located.

hope this .