It was not plausible that Brett Carstairs should find a picture of a girl, to all appearances human, in millenia-old ruins on a planet some hundreds of lightyears from earth. But the whole affair was unlikely, beginning with the report of the exploring-ship which caused the Thalassia-Aspasia Expedition in the first place. Had it not been for the photographs and the ceramic artifacts, nobody would have believed that report. It simply...