The Sara Haardt Mencken collection at Goucher College includes letters exchanged between Haardt and Mencken and condolences written after her death. Some of Mencken's vast literary correspondence is held at the New York Public Library. "Gift of HL Mencken 1929" is stamped on "The Marriage of Heaven and Hell", Luce 1906 edition of William Blake, which shows up from the Library of Congress online version for reading. Mencken's letters to Louise (Lou) Wylie, a reporter and feature writer for New Orleans's "The Times-Picayune" newspaper, are archived at Loyola University New Orleans.