Hurriedly, he looked again at the trucks. The pottery! Recognition came to him. Once he had driven past a crematorium and seen men unloading the same sort of urns from a truck with the same company markings. He swung the binoculars again, searching for the truck loaded with firebrick. The truck had moved. At last he located it, now parked inside the area. The bricks were being unloaded near the great red engine. He inspected the engine again. What had at first glance appeared to be a boiler, now suggested an oven or a furnace. "Evenit diabolus!" the abbot growled, and started for the wall stairs.