L. Frank Baum, the author of The Wizard of Oz and other stories, at work at his typewriter in 1899, the year before his first Oz book was published.
Bonus: I found the photograph illustrating an essay by Kennesaw State University historian David B. Parker in the Bluegrass Express, a reprint of his 1994 article in The Journal of the Georgia Association of Historians, on the claim that The Wizard of Oz was written as a populist parable.
Every history teacher ought to read that article.
http://thebluegrassspecial.com/archive/2009/october2009/ozpoppycockoct09.php