I read many years ago in Scientific American (and I'm not sure if I still have the source at home) that, when Hubble first published, he did not have enough velocity-distance determinations to statistically support his 'discovery'. Possibly he jumped the gun to make sure he was the first to publish but I don't know how it got past the referees (choose poor statisticians?). In any case, within a year or so he had enough data to support his discovery and the rest is history.
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