The title is based on a line from the 1861 poem "Paul Revere's Ride" by
Henry Wadsworth Longfellow about the call to arms going throughout the Boston countryside as the British marched on Concord. One lantern was to be hung in the tower of the Old North Church if the British came by land and two if they crossed the Charles River. "One if by land, and two if by sea; And I on the opposite shore will be, Ready to ride and spread the alarm Through every Middlesex village and farm, For the country folk to be up and to arm."
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