[BAUM, L. Frank]. Advertisement from The Cosmopolitan for The Master Key. (ca. 1901). Single sheet with a number of advertisements featuring b&w photographs and illustrations. A clean sheet with small puncture holes where the sheet was stapled into the magazine.

A single sheet of advertisements featuring an advertisement for The Master Key by L. Frank Baum, published by the Bowen-Merrill Company of Indianapolis (the company’s name was changed to Bobbs-Merrill in 1903). Also on the same side of the sheet are advertisements for Stuttering Classes, correspondence classes for Law, drawing, and languages. On the verso are advertisements for other correspondence classes for engineering, business, civil service, photography, science and more. A wonderful piece of advertising ephemera for a modern fairy tale by the author of The Wonderful Wizard of Oz, issued the year after that triumph.