Fire Board dispatched companies to 213 Mulberry, Darby Borough for the dwelling fire. Arriving units found heavy fire in the basement and rear of a 2 story mor dwelling. Crews led off with 1-3/4 handlines and made a quick knock on the fire. Truck companies ventilated, while interior crews opened up to check for extension. Heavy smoke was still pushing from the 1st & 2nd floors. Some fire was found in the walls which was quickly taken care of. The fire was placed under control in approx 30 minutes.