Original 1963 clip art. 9.5 x 12.5 print ad.
"A bus carrying prisoners on their way to jail, is hijacked by a gang, who want to free one of the passengers. The rest of the prisoners are locked in a petrol soaked barn, and warned not to escape. When the police find the body of the freed prisoner, dead in a car crash, they try and backtrack, to find the bus, and the rest of the prisoners, before the barn catches fire."