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In page Greyhound:

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All modern pedigree Greyhounds derive from the Greyhound stock recorded and registered first in private studbooks in the 18th century, then in public studbooks in the 19th century, which ultimately were registered with coursing, racing, and kennel club authorities of the United Kingdom.[8] Historically, these sighthounds were used primarily for hunting in the open where their pursuit speed and keen eyesight were essential.[citation needed]