One day, he has the idea to apply the double-entry system to his life. Every aggravation Malry suffers from society—such as being forced to walk along a particular stretch of pavement due to a building's placement—is revenged by a recompense—in this case, " an unsightly line about a yard long into the blackened portland stone facing of the office block" (23–4). Having established this system, and growing progressively angry at society, Malry graduates from minor acts of personal revenge (mostly vandalism) to large-scale terrorism: bombing hoaxes, an actual bombing, and poisoning West London's drinking water. Shortly before he manages to bomb the House of Commons, he dies of cancer.