Nearly ten years have gone by since Dr. Cyril Bailey gave to lovers of Lucretius his edition of the poet in three volumes, winning for himself a crown, insignem cum laude coronam, after a lifelong quest and bestowing upon us an enlarged understanding of that wonderful work of antiquity, the De Rerum Natura, which holds in its ‘massive and magnificent whole’ many a valuable message for the modern world, could it but read them. At the outset of his commentary Dr. Bailey draws attention to a discrepancy that has often been discussed, namely that which lies between the literary masterpiece with which the poem opens, the invocation to Venus, and the Epicurean belief entertained by the poet that the gods neither govern the forces of Nature nor interfere in the affairs of men. On the one hand, Venus is addressed as a creative power with prayers for inspiration and assistance and for peace; on the other hand, we are told that the nature of the gods needs nothing of us, is untouched by anger, and is unmoved by merit; and if the reading of the manuscripts be retained, the second set of lines immediately succeeds and contradicts the first.