Answer:In paragraph 21, Smith alters the reference to the Four Horsemen of the Apocalypse by calling them the "Four Horsemen of Calumny"[1]. While the biblical Four Horsemen symbolize death, famine, war, and conquest[2], Smith's reference to the Four Horsemen of Calumny alludes to the idea that these horsemen represent slander and defamation[1]. By doing so, Smith is using this allusion to suggest that the attacks against him are not just personal, but are part of a larger campaign of lies and deceit. He is implying that those who are attacking him are not just trying to harm him, but are trying to harm his reputation and character as well. In this way, Smith is using the allusion to the Four Horsemen of Calumny to emphasize the seriousness of the attacks against him and to suggest that they are part of a larger, more insidious campaign.