"This Dust Was Once the Man" is a brief elegy written by Walt Whitman in 1871. It was dedicated to Abraham Lincoln, the 16th president of the United States, whom Whitman greatly admired. The poem was written six years after Lincoln's assassination. Whitman had written three previous poems about Lincoln, all in 1865: "O Captain! My Captain!", "When Lilacs Last in the Dooryard Bloom'd", and "Hush'd Be the Camps To-Day".