The turning point in his career is considered to have been in 1908 with his assignment, as part of a series of biographies of famous men, to interview industrialist Andrew Carnegie, who at the time was one of the richest men in the world.

• 希尔事业的转折始自1908年的一次系列采访美国名人的任务，当时他采访了全美最富有的企业家安德鲁-卡内基。