A bit of the island’s past came to life and brought scores of emergency responders to investigate a 14-inch, 350-pound cannonball found this week. It was discovered by workers underwater outside the seawall at the ferry dock, as construction continues to rebuild the access point for the 2012 season. According to The Post, the 19th Century projectile was found February 2 by workers doing construction near Soissons Dock, where the ferries from Manhattan access the island, said Elizabeth Rapuano,‎ chief of staff for the city-run Trust for Governors Island. A member of the New York Police Department said, “They were digging in the water with a backhoe, removing muck and mud, when this thing…