Catilina in particular was one of the most nefarious men in that nefarious age. His villanies belong to the criminal records, not to history; but his very outward appearance - the pale countenance, the wild glance, the gait by turns sluggish and hurried - betrayed his dismal past. He possessed in a high degree the qualities which are required in the leader of such a band - the faculty of enjoying all pleasures and of bearing all privations, courage, military talent, knowledge of men, the energy of a felon, and that horrible mastery of vice which knows how to bring the weak to fall, and how to train the fallen to crime.

Vol. 4, Pt. 1, Translated by W.P. Dickson - The History of Rome 1854-6