When the British left Boston, March 17, 1776, a number of their ships remained in the harbor. On June 13, 1776, American soldiers landed on Long Island, Boston Harbor, and at Nantasket Hill and opened fire on this fleet who were soon at their mercy. Before sailing away, the British sent a boat ashore at Boston Light and left a time charge which blew up the lighthouse. The top of the old lighthouse was used to supply ladles for American cannon.