I."Imperator," Cicero is named, ii., [91].Income, Cicero's amount of, i., [61], [99].Insincerity of Cicero, ii., [112];almost necessary, ibid.;Cicero's defended, [247].Invective, bitterness of Cicero's, i., [32].Inventione, De, i., [51];four books remaining, ii., [251], [253].