Suddenly there was a heavy explosion. The ground heived. I looked up and saw a metallic spider. A monstrous tripod, higher than the tallest steeple. The walking engine of glittering metal, emitting indefinate power, wich roared like thunder. Overhead, a huge funnel. And I realized with horror that I had seen this aweful thing before. The ghostly, terrible, heatray. Fire. Roared, like thunder. Fire.