E. G. Sihler, a scholar who published extensively on Caesar and Cicero, here uses his knowledge of those two authors to evaluate Guglielmo Ferrero's History of Rome from Sulla downward. The essay exposes the great difficulties involved in sorting truth from the surprisingly flawed sources for the history of the Late Republic and Early Empire. Classicists and Historians will find it a useful critique of Ferrero and an illuminating survey of the relevant source material.