 Marshall was elected to Phi Beta Kappa during his final year at college . He graduated in June 1873 , receiving the top grade in fourteen of his thirty @-@ six courses in a class of twenty @-@ one students . As a result of his libel case , he had become increasingly interested in law and began seeking someone to teach him . At that time , the only way to become a lawyer in Indiana was to apprentice under a member of the Indiana bar association . His great @-@ uncle Woodson Marshall began to help him , but soon moved away . Marshall went to live with his parents , who had moved to Columbia City . There he read law in the office of Walter Olds , a future member of the Indiana Supreme Court . He studied in the office for over a year and was admitted to the Indiana bar on April 26 , 1875 . 
