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X v. Rex is especially notable because, had the author chosen to take a slightly different approach to the story, this tale of an unknown killer systematically targeting London’s policemen could have been presented as a first-rate classically structured whodunit.
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"Haven't you seen enough horses for today?" said Miss Rooksby, for the three had just returned from Olympia.
"No!" said Philip stoutly.
"Well, I have," said Miss Rooksby and laughed and hailed a taxi, which presently bore the three of them up the hill and out of this story.