The irony here is quite remarkable: Hobbes, who would later spend years publishing and defending numerous attempts to square the circle, published his first mathematical work as part of a campaign to silence an old circle squarer. Indeed, less than a decade after his participation in Pell's battle with Longomontanus, Hobbes would find himself involved in a prolonged and bitter controversy that centered on his claims to have squared the circle, and he would go to his grave insisting that he had solved this ancient geometrical problem.