Institutio Oratoria

For both a and gres are short, but the latter lengthens the former, thereby transferring to it something of its own time-length. But how can it do this, unless it possesses greater length than is the portion of the shortest syllables, to which it would itself belong if the consonants st were removed? As it is, it lends one time-length to the preceding syllable, and subtracts one from that which follows. [*]( This theory involves the allotment of a time-value to consonants: gres gives the time-value of gr to a, and itself borrows an equivalent time-value from st. This view is more explicitly expressed by the fifth-century grammarian Pompeius (112. 26k), who allots the value of half a time-length to each consonant. Therefore to ă (= one time-length) are added the two half time-lengths represented by gr (see Lindsay, Lat. Language, p. 129). ) Thus two syllables which are naturally short have their time-value doubled by position.

I am, however, surprised that scholars of the highest learning should have held the view that some feet should be specially selected and others condemned for the purposes of prose, as if there were any foot which must not inevitably be found in prose. Ephorus may express a preference for the paean (which was discovered by Thrasymachus and approved by Aristotle) and for the dactyl also, on the ground that both these feet provide a happy mixture of long and short; and may avoid the spondee and the trochee,