Sixty-three years after the signing of the Declaration, sixty-four years after the Revolution began, a monument was put up near a bridge that Paul Revere had ridden over on his historic messenger ride. His ride began in the evening of the 18th of April; Emerson's poem commemorates the events that it caused on the 19th.
By the rude bridge that arched the flood,
Their flag to April's breeze unfurled;