The Mystery of the iron mask - Von Keler, Theodore M. R. (Theodore Maximilian R.), 1877-1927. (Girard, Kan. : Haldeman-Julius Co., 1923)
Pages 61-64 contain advertising matter.
Advertised 4 August 1923, Haldeman-Julius Weekly, p. 1.
Later printings issued in Little blue book series wrappers; printings after 1945 lack advertising matter.
Keywords: Mattioli, Ercole Antonio, -- conte, -- 1640-1703.