It is by this operation that unfair cards are introduced, and too often
without creating suspicion, by the ingenuity with which it is performed.
Certain fair cards are taken out of the original stamped cover, without
injury to it, and in their stead either concave, convex, or pricked
ones, or reflectors, are placed. The stamp being stuck on the cover by
means of gum, which the application of warm water dissolves, or deprives
of its tenacity: a kettle of hot water and a sponge are the only things
requisite. The exchange being completed, the unfair pack finds its way
into societies of a certain description, where it is contrived to be
placed on the card-tables unobserved. Plunder is the inevitable result.