Answer:
Because the novelists or narrator, has been fighting and haunted by bad dreams for many years and he has seen many people die over the years. As a results the dead are never far from his memory. These descriptions are intended to show how being surrounded by the unburied bodies affects him emotionally and psychologically.
The value of the 7 in 6,735 is 700 because it is in the hundreds place.
Macbeth hallucinates a dagger after Banquo leaves.
