On April 16, 1775, aware of pending troop movements, he rode to Concord, Massachusetts to warn residents there and urge them to move their stockpile of arms. Two nights later in April 18, he observed a pre-arranged signal of lanterns hung in the bell tower of the Old North Church and knew that British regulars had been ferried across the Charles River to Cambridge.<ref>http://www.paulreverehouse.org/ride/real.html</ref> | On April 16, 1775, aware of pending troop movements, he rode to Concord, Massachusetts to warn residents there and urge them to move their stockpile of arms. Two nights later in April 18, he observed a pre-arranged signal of lanterns hung in the bell tower of the Old North Church and knew that British regulars had been ferried across the Charles River to Cambridge.<ref>http://www.paulreverehouse.org/ride/real.html</ref> |