A mask to conceal some design; a person put forward to mislead; a sham. Fowlers used to conceal themselves behind horses, and went on stalking step by step till they got within shot of the game.
N. B. To stalk is to walk with strides, from the Anglo-Saxon stælcan.
“He uses his folly like a stalking-horse, and under the presentation
of that he shoots his wit.” —
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894