jack-hare

However, as he thought he had now found a man nimble enough, he was willing to indulge himself with other sport, and accordingly, crying out, "Stole away," encouraged the hounds to pursue Mr Adams, swearing it was the largest jack-hare he ever saw; at the same time hallooing and hooping as if a conquered foe was flying before him; in which he was imitated by these two or three couple of human or rather two-legged curs on horseback which we have mentioned before.

Joseph Andrews, Volume 2 Henry Fielding 1730