What is the track or trail of an animal. To run a foil,to lead astray; to puzzle; -- alluding to the habits of some animals of running back over the same track to mislead their pursuers. Brewer called?

foil — The track or trail of an animal. To run a foil,to lead astray; to puzzle; -- alluding to the habits of some animals of running back over the same track to mislead their pursuers. Brewer. (Webster's 1913.)

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