Definition of "jackall"

The jackall, the syagush, the wolf, and the dog, are of this kind; they pursue with patience rather than swiftness; their prey flies at first, and leaves them for miles behind; but they keep on with a constant steady pace […]

1774?, Oliver Goldsmith, A History of the Earth and Animated Nature

A nephew of hers, after receiving some learning at her ladyship's expence, got a commission, and fell upon the field of Waterloo; another is still at her heels, as a sort of jackall to fetch and carry when required.

1819 July 1, “The Political Vis——ss”, in [John Mitford], editor, The New Bon Ton Magazine; or, Telescope of the Times, volume III, number 15, London: […] J[oseph] Johnson, […], page 179