The harbor is still. Somewhere, British soldiers are getting ready to leave town. They hope to march quietly toward Concord and seize the colonists’ stored gunpowder, muskets, and supplies before anyone can stop them. There are no phones. No radios. No text messages. If the soldiers move faster than the news, Concord’s stores could be taken and local militias might be caught sleeping. You have lanterns in a church tower, horses on country roads, church bells, and neighbors who can knock on farmhouse doors.