Noctes Atticae
Gellius, Aulus
Gellius, Aulus. The Attic Nights of Aulus Gellius. Rolfe, John C., translator. Cambridge, Mass.; London: Harvard University Press; William Heinemann, 1927 (printing).
That Marcus Varro in heroic verse noted a matter demanding very minute and careful observation.
IN the long lines called hexameters, and likewise in senarii, [*](See note on iv. 5. 6 (vol. i, p. 328).) students of metric have observed that the first two feet, and also the last two, may consist each of a single part of speech, but that those between may not, but are always formed of words which are either divided, or combined and run together. [*](That is, the first two feet and the last two may consist of undivided words, but the third and fourth are formed either of words which are divided, or of parts of different words. But that this rule is not invariable was shown by Muretus, Variae Lectiones, xi. 6.) Varro in his book On the Arts [*](Fr. 116, G. and S.) wrote that he had observed in hexameter verse that the fifth half-foot always ends a word, [*](That is, there is a caesura in the fifth foot, according to Varro.) and that the first five half-feet are of equally great importance in making a verse with the following seven; and he argues that this happens in accordance with a certain geometrical ratio.