Medford presents its third annual Sarah Bradlee Fulton Day in tribute to the heroine of the American Revolution from Medford, sometimes referred to as "The Mother of the Boston Tea Party." This year's event will feature a special appearance by George Washington on horseback. There also will be a historical walk, fifes and drums, Colonial dress-up for children, and a new play, "Ghostly Appearances," performed at the Salem Street Burying Ground. Prepare to be haunted by Sarah Bradlee Fulton, Captain…