1892: Walt Whitman, one of the most influential poets in American history, dies at the age of 72 in Camden, N.J. The cause of death was officially listed as "pleurisy of the left side, consumption of the right lung, general miliary tuberculosis and parenchymatous nephritis." Whitman's work was very controversial in its time, particularly his poetry collection "Leaves of Grass," which was described as obscene for its overt sexuality. Some of Whitman's best known poems include "Song of Myself," "O Captain! My Captain!" and "Beat! Beat! Drums!"