- Margaret Fuller, schoolteacher and pioneer in the campaign for women’s rights. Greeley started her on her literary career writing newspaper articles and books.
- Ralph Waldo Emerson. Greely, says one historian, was “the single most important source of popular knowledge of Emerson’s name and ideas,” bringing the author to America’s attention by praising his work in the Tribune.
- Henry David Thoreau. Greeley served as Thoreau’s literary agent for more than a decade.
- Edgar Allan Poe. Greeley supported Poe, lending him $50 (which Poe never returned) to finance his Broadway Journal.
—Adapted from Horace Greeley: Champion of American Freedom, Robert C. Williams, New York University Press.