A warning to the flocks against wolves in sheeps cloathing. Or, A faithful advice, from several ministers of the Gospel, in and near Boston, unto the churches of New-England, relating to the dangers that may arise from impostors, pretending to be ministers. : With a brief history of some impostors, remarkably and seasonably detected written, by one of the ministers in Boston, to assert that advice, and prevent future mischiefs. : [Five lines of Scripture texts]