Kent County Box 6001 was dispatched at 2224 hours for a dwelling fire at 829 High Street in Chestertown.  Engine 55 staffed with four responded on the run along with units from Kent County Company 6.  Our engine company arrived with their units operating on a working fire in a two story SFD with the bulk of the fire knocked.  Engine 55 was directed to set-up positive pressure ventilation and provide lighting to the interior.  Once all assigned tasks were completed, Command held the units from Kent 6 placing the remainder in service.  Engine 55 returned to quarters within an hour.