Firefighters from Mine HILL,New Jersey,responded to 18 William St. on a reported house fire. As the first arriving units had heavy smoke was showing from a 1 1/2 home. The house was vacantat the time of the fire. Mutual aid was requested bringinh units from Wharton Fire Department to respond as well as a FAST Team from the near by town of Dover . The was brought under control in about 1 hour. The cause of the fire is under investigation