chunk: With Wilbur Whateley dead, no one attends to the mysterious presence growing in the Whateley farmhouse. Early one morning, the Whateley farmhouse explodes and the thing, an invisible monster, rampages across Dunwich, cutting a path through fields, trees, and ravines, leaving huge "prints" the size of tree trunks. The monster eventually makes forays into inhabited areas. The invisible creature terrorizes the town for several days, killing two families and several policemen, until Dr. Armitage, Professor Warren Rice, and Dr. Francis Morgan arrive with the knowledge and weapons needed to kill it. The use of a magic powder renders it visible just long enough to send one of the crew into shock. The barn-sized monster screams for help - in English - just before the spell destroys it, leaving a huge burned area. In the end, its nature is revealed: it is Wilbur's twin brother, though it "looked more like the father than Wilbur did."