The collection consists of 110 letters (two are autograph letters, the rest typed) by Mencken to David Warren Ryder, a San Francisco area journalist, written mainly from Baltimore and New York between the years 1922 and 1947 (but nearly all from the 1920s & 1930s, and the majority of these from the 1920s). Ryder was a frequent contributor to The American Mercury, edited by Mencken from 1924 to 1934. (Ryder had previously written for The Smart Set,edited by Mencken and George Jean Nathan.) In the letters, Mencken critiques Ryder's submissions (there are many brief letters turning them down but usually for stated reasons), offers ideas for different articles, and generally exhibits the distinctive style that made him one of the most influential American magazine editors of the twentieth century. Aside from his remarks on Ryder's submissions, Mencken's letters are full of pithy, acerbic comments on a variety of subjects, including religion, politics (and the presidents Harding, Coolidge, Hoover, and Franklin Delano Roosevelt), Prohibition, California, censorship, hypocrisy, "modernism," international affairs, life in America, books he is working on, and John Steinbeck. Nearly all of the letters are single-spaced on letterheads of The Smart Set or The American Mercury, and on personal stationery. Included with the Mencken letters are carbon copies of two Ryder letters to Mencken, a 1924 typed letter from George Jean Nathan to Ryder, and four letters (1922-1955) from Mencken secretaries to Ryder.