At 22:54 hours members overheard Lancaster County Wide Communications pre-alert companies for a dwelling in Pioneer Fire Company No. 1 Marietta, PA.’s first due. The Rescue Squad immediately responded with 7 personnel. Chief 10 arrived with a 2 1/2 single family with nothing showing. Rescue 41-1 laid 800 feet of supply line and deployed two lines into the residence. Upon investigation, crews from 41 and 79 (Maytown-East Donegal Township Fire Department) found a working fire in the walls on the second floor with minor extension to the attic. The fire was held to the area of origin. The box was placed available around 00:30 hours.