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On the sign:
LEXINGTON HISTORICAL SOCIETY
Hancock-Clarke Parsonage 1737
Lexington Destination of Paul Revere and William Dawes April 18, 1775
The sign is at the destination of Paul Revere and William Dawes famous "Midnight Ride" designed to warn militias about British troops advancing towards them from Boston. The warning prepared the militia forces for the first battle that began the next day.