Destressed: The speaker struggles to process the death of his hero. He is overcome with sorrow and shock.
O heart! heart! heart!, bleeding, cold, dead, pale, still, no pulse, mournful tread, fallen
"O the bleeding drops of red..."
Each eight-line stanza is split into two distinct parts. The first four lines are long and praise lincolns achievements. The last four lines are short and give agitated descriptions of lincolns dying moments.
The speaker's distress is made greater by the heroism of the captain. This conveys a theme about honoring our fallen heros.