Box 1-4 toned out at 0405 hours sending Squad 8, Wagon 4, Tower 1, Truck 2, and Captain 4 (Feldman) to S. 15th and Swatara Streets for a reported structure fire. Squad 8 arrived with a 3 story, wood frame, duplex at 1435 Swatara Street with fire on the third floor rear and they have a hydrant on the corner. 2 lines were stretched into second and third floors of the fire building and an additional line stretched from Wagon 4 into the exposure building at 1433 Swatara Street. The visible fire was knocked down quickly and the fire brought under control at 0443 hours. Both units were reported to be vacant.