The H. L. Mencken Collection consists of writings, correspondence, and other material by and relating to the American author H. L. Mencken. Works documented in the collection include early poems, short works of opinion and journalism, and longer books such as The American Language (New York: Alfred A. Knopf, 1919) and Treastise on the Gods (New York: Alfred A. Knopf, 1930). Writings consist of drafts in various stages, setting manuscripts, and proofs, many of which are corrected. Several manuscripts are signed and inscribed by Mencken to journalist and collector Bradford F. Swan. Correspondence is chiefly outgoing and relates to the themes that are prominent in Mencken's writings (American politics, language, and society) as well as to the business of Mencken's writing. In addition to writings and correspondence by Mencken, the collection includes writings about Mencken, particularly the work of Margaret Lappin, sister of his longtime secretary, Rosalind Lohrfinck.