I will say nothing of the people who continued to believe that the earth was hollow, long after the Poles had been charted. I will not mention the German technicians who, in 1942, constructed a telescopic camera on the island of Rügen, which pointed 45° into the sky. It would have been able to detect the British Fleet from very far off—if it turned out that the Earth was concave, and we, unwitting Symzonians, were living on the inside of it. I will not speculate on their state of mind, as they watched the sky for ships. I will not wonder whether they were happy people, or disappointed people, or something in between.