In his discussion of Virgilian imitations of Lucretian phraseology Cyril Bailey examines the phenomenon of what he terms the ‘doublet’, that is, the procedure whereby Virgil imitates separate elements of a Lucretian phrase at different points in his own work. Take, for example, De Rerum Natura 1. 210–12: esse videlicet in terris primordia rerum, quae nos fecundas vertentes vomere glebas terraique solum subigentes cimus ad ortus.