A variation on these explanations is derived from the traditional use of gallows as public weighing scales (and not just a means of public execution) and suggests that the cross was used to weigh certain goods entering or exiting the city of Dublin by this boundary, so as to charge a tax or tariff, or that a fee was charged by weight for goods crossing a ford over one of the watercourses that predated the Grand Canal by one or more of the families, groups or individuals described as controlling the area above.