The identity of this man was unknown for more than 110 years and subject to heated debates in the magic community. We are now certain that S. W. Erdnase was Edward Gallaway. For more details see this article.
Originally entitled Artifice Ruse and Subterfuge at the Card Table, is probably the most cited and referenced book about card gambling moves - a classic in the history of magic literature. A must read for any card magician or aspiring gambling expert