The operation of the C&O Canal lock was a little miracle of human ingenuity and mule muscle. When a boat came in, the work crew would blow a horn and cry "Lock ready!" The heavy wooden gate would be ...
The operation of the C&O Canal lock was a little miracle of human ingenuity and mule muscle. When a boat came in, the work crew would blow a horn and cry "Lock ready!" The heavy wooden gate would be ...
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