Simile comparing his friend in the tower to a sentinels tread. It is a similie because it is comparing what he hears to the horse using like.
"That he could hear, like a sentinels tread."
Theme, and importance of the poem. It is describing the importance of his mid night ride to the city of Boston. It is the general idea of the poem, so that he could get his point across before they attack.
"The fate of a nation was riding that night"
Form of imagery describing what Pual Revers friend is looking at. It gives a clear representation of what Paul's friend was looking out at, when he was on the tower, making it easy for the reader to visualize it.
"Beneath in the churchyard, lay the dead, In their night encampment on the hill"
Alliteration is shown with flying fearless and fleet. There is a repetition of the same constant sounds 3 times making it alliteration
"Flying Fearless and fleet"
The quote shown above represents personification because saying thoughts can be bent is not possible. The author gave thoughts a human trait that is impossible for it to have.
"For suddenly all his thoughts are bent."
This is an onomatopoeia shown in the quote because it using words to describe a sound the birds make. Without actually hearing it.