publisher: Sloan-Duployan Shorthand Headquarters, n.d. [1920], Ramsgate, Kent] Sloan-Duployan Shorthand. 176 x 117mm, green cloth, covers ruled in blind, upper cover lettered in gilt, pp.46 + advertisement leaf.
The system claims to have been awarded Gold Medals and to be presently the most popular system in the world. 1893