Cicero's letter to his brother Quintus from February 54 is best known for containing the sole explicit contemporary reference to Lucretius’De rerum natura, but it is also notable as the source of the only extant reference of any kind to another (presumably) philosophical didactic poem, Sallustius’Empedoclea(Q. fr.2.10(9).3= SB 14):Lucretii poemata, ut scribis, ita sunt: multis luminibus ingenii, multae tamen artis. sed, cum ueneris. uirum te putabo, si Sallusti Empedoclea legeris; hominem non putabo.Lucretius’ poems are just as you write: they show (...) many flashes of inspiration, but many of skill too. But more of that when you come. I shall think you a man, if you read Sallustius’Empedoclea; I shan't think you a human being. (shrink)