Firefighters in Venango County found a man dead on Saturday after a house fire in Cornplanter Township. Crews responded to 61 Rockwood Avenue just before 7:00 a.m. Saturday. Cornplanter Township volunteer firefighters say the fire quickly burned through both ends of the roof. Crews found the body of Garrett Cluff, 58, of Oil City when they went inside the house to investigate. State police say Cluff apparently died from heat and smoke inhalation. An autopsy was done on Sunday afternoon. There`s no word yet on the cause of the fire.