The lives of Catullus and Horace overlap by a dozen years in the first century BC. Yet, though they are the undisputed masters of the lyric voice in Roman poetry, Horace directly mentions his great predecessor, Catullus, only once, and this reference has often been taken as mocking. In fact, Horace's allusion, far from disparaging Catullus, pays him a discreet compliment by suggesting the challenge that his accomplishment presented to his successors,...