A Key to Puzzledom or Complete Handbook of the Enigmatic Art
1906 · New York
by Eastern Puzzlers' League
New York: William W. Delaney, 1906. Compiled and published under the auspices of the Eastern Puzzlers' League. [ix] 145p., original black cloth. "Printed at the Press of Duane Powell, Dowagiac, Mich (Inventory #: 046324)