sentences:  The Grand Street and Newtown Rail Road began building the line in September 1860, and opened the first section, from the Grand Street Ferry on the Williamsburg waterfront to Bushwick Avenue, on October 15, 1860, with a formal opening on October 30.In addition to the Grand Street Ferry, cars soon also served the Broadway Ferry via the track of the Brooklyn City Rail Road's Greenpoint Line on Kent Avenue.By 1865, the line had been extended from Grand Street north along Bushwick Avenue, Humboldt Street, and Meeker Avenue to Penny Bridge.