The Wilton C. Dinges Collection is arranged into five Series. I. Biographical Information, II. Antoinette Feleky, III. Correspondence, IV. Manuscripts & Published Material and V. Miscellaneous. The bulk of the collection is correspondence between Mencken and Antoinette Feleky, wife of Charles Feleky, a close friend of Mencken's. Other items include several typed manuscripts, bibliographic information compiled from newspaper and magazine articles about Mencken, family and friends and other miscellaneous. The library also holds more than 150 volumes of Menckeniana in addition to two scrapbooks (indexed) of photostatic copies of editorials and articles by Mencken that appeared in the Baltimore Evening Sun, from 1920 - 1938.
Materials in the Mencken collection have a connection to "Mencken, H.L. (Henry Louis), 1880-1956" which can be found under a book's "Subject" or "Creator" in MUSCAT Plus.