May : Happenings from the past May 5,1884 Isaac Murphy , son of a slave and perhaps the greatest horse rider in American history , rides Buchanan to win his first Kentucky Derby . He becomes the first rider ever to win the race three times . May 9 , 1754 Benjamin Franklin's Pennsylvania Gazette produces perhaps the first American political cartoon  , showing a snake cut in pieces, with the words " Join or Die" printed under the picture. May 11,1934 The first great dust storm of the Great Plains Dust Bowl , the result of years of drought,blows topsoil all the way to New York City and Washington , D.C. . May 19, 1994 Jacqueline Lee Bouvier Kennedy Onassis , former first lady and one of the most famous people of the 1960s , died of cancer in New York City at the age of 64 . May 24, 1844 Samuel F.B. Morsr taps out the first message , " What Hath God Wrought ," over the experimental long-distance telegraph line which runs from Washington, D.C. , to Baltimeore , Md . We know from the text that Buchanan is  _  .
Isaac"s father a winning horse a slave taking care if horses the first racing horse in Kentucky