- 问题详情:May:HappeningsformthePastMay5,1884IsaacMurphy,sonofaslaveandperhapsthegreatesthorseriderinAmericanhistory,ridesBuchanantowinhisfirstKentuckyDerby.Hebecomesthefirstriderevertowintheracethreetimes.May9,1754BenijaminFranklin’sPennsylvaniaGazett...
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