Cat. 3, 16 tam diu, dum urbis moenibus continebatur; Off. 1, 2 tam diu ... quoad ... MENTE ... RATIONE ... COGITATIONE: 'by thought, by reasoning, by imagination'. Cogitatio like διανοια has often the sense of 'imagination'. The close juxtaposition of words nearly synonymous is quite characteristic of Cicero's Latin. QUIDEM: concessive, as in 32 and often.