Jane Austen's letter to her sister Cassandra (1815)
John Keats's final letter to Fanny Brawne (1820)
Henry David Thoreau's earliest letter to Ralph Waldo Emerson (1842)
Walt Whitman's letter to Thomas Sawyer (1863)
Emily Dickinson's letter to Benjamin Kimball (ca. 1885)
Oscar Wilde's letter to the governor of Reading Gaol (1897)